diff --git a/README.md b/README.md
index 8975ff9504c9dacd9fb39fda092971ed7b25f0f2..3c971a1552a2216a7f65fa6c1f9385bee59c9316 100644
--- a/README.md
+++ b/README.md
@@ -1,33 +1,43 @@
 # MinVel ![Photo of andesite thin section by Cheryl Cameron](images/thinsectionandesiteSmall.png)
+
 This program is used to calculate anharmonic p- and s-wave velocity and density for zero-porosity
-mineral aggregates. It is based on the work of Hacker and Abers (2004, updated in 2016) with 
-additional minerals and optimized for related work. Running the code in either MATLAB or Python 
-requires a mineral physics database, MineralPhysicsDatabase.nc. Combined with a petrologic 
-database (Sowers and Boyd, 2019) and thermal and geologic models, results from this code are 
-used in the program RockProp.m, which accounts for rock porosity and seismic attenuation. 
-These codes are part of an effort to produce a three dimensional national crustal model 
-for use with seismic hazard studies (https://doi.org/10.5066/P9T96Q67).
+mineral aggregates. It is based on the work of Hacker and Abers (2004, updated in 2016) with
+additional minerals and optimized for related work. Running the code in either MATLAB or Python
+requires a mineral physics database, MineralPhysicsDatabase.nc. Combined with a petrologic
+database (Sowers and Boyd, 2019) and thermal and geologic models, results from this code are
+used in the program RockProp.m, which accounts for rock porosity and seismic attenuation.
+These codes are part of an effort to produce a three dimensional national crustal model
+for use with seismic hazard studies (<https://doi.org/10.5066/P9T96Q67>).
 
 ## Python
+
 See the [README](minvel/README.md) file in the [minvel](minvel) directory for instructions
 on installing the mineral velocity database and running in Python.
 
 ## Matlab
+
 See the [README](matlab/README.md) file in the [matlab](matlab) directory for running
 the in MATLAB.
 
 ## Help
-Any questions regarding the code can be directed to olboyd@usgs.gov.
+
+Any questions regarding the code can be directed to <olboyd@usgs.gov>.
 
 ## References
-*Abers, G.A., and Hacker, B.R., 2016, A MATLAB toolbox and Excel workbook for calculating 
+
+*Abers, G.A., and Hacker, B.R., 2016, A MATLAB toolbox and Excel workbook for calculating
 the densities, seismic wave speeds, and major element composition of minerals and rocks at
  pressure and temperature: Geochem. Geophys. Geosys., v. 16, p. 616–624.*
 
-*Hacker, B.R., and Abers, G.A., 2004, Subduction Factory 3: An Excel worksheet and macro 
-for calculating the densities, seismic wave speeds, and H2O contents of minerals and rocks 
+*Hacker, B.R., and Abers, G.A., 2004, Subduction Factory 3: An Excel worksheet and macro
+for calculating the densities, seismic wave speeds, and H2O contents of minerals and rocks
 at pressure and temperature: Geochem. Geophys. Geosys., v. 5, no. Q01005.*
 
-*Sowers, T., and Boyd, O.S., 2019, Petrologic and mineral physics database for use with 
-the U.S. Geological Survey National Crustal Model: U.S. Geological Survey Open-File Report 
-2019–1035, 17 p., https://doi.org/10.3133/ofr20191035.*
+*Sowers, T., and Boyd, O.S., 2019, Petrologic and mineral physics database for use with
+the U.S. Geological Survey National Crustal Model: U.S. Geological Survey Open-File Report
+2019–1035, 17 p., <https://doi.org/10.3133/ofr20191035>.*
+
+**Suggested citation:** Boyd, O. S., Clayton, B. S., 2019, MinVel—Program to calculate
+anharmonic P- and S-wave velocity and density for zero-porosity mineral aggregates: U.S.
+Geological Survey software release, <https://doi.org/10.5066/P9FK25WM>, IP-111290,
+BAO Approval 08/20/19.
diff --git a/matlab/README.md b/matlab/README.md
index 328f53d4b4f72555e31b35b31ac10837d5a7467a..63c87d0579afe73a4bb4f83f3e78f0d768eb2f4b 100644
--- a/matlab/README.md
+++ b/matlab/README.md
@@ -1,10 +1,20 @@
 # MinVel MATLAB routine ![Photo of andesite thin section by Cheryl Cameron](../images/thinsectionandesiteSmall.png)
 
-This program is used to calculate anharmonic p- and s-wave velocity and density for zero-porosity mineral aggregates. It is based on the work of Hacker and Abers (2004, updated in 2016) with additional minerals and optimized for related work. Running the code requires a mineral physics database, MineralPhysicsDatabase.nc. Combined with a petrologic database (Sowers and Boyd, 2019) and thermal and geologic models, results from this code are used as part of an effort to produce a three dimensional national crustal model for use with seismic hazard studies (<https://doi.org/10.5066/P9T96Q67>).
+This program is used to calculate anharmonic p- and s-wave velocity and density for zero-porosity
+mineral aggregates. It is based on the work of Hacker and Abers (2004, updated in 2016) with
+additional minerals and optimized for related work. Running the code requires a mineral physics
+database, MineralPhysicsDatabase.nc. Combined with a petrologic database (Sowers and Boyd, 2019)
+and thermal and geologic models, results from this code are used as part of an effort to produce
+a three dimensional national crustal model for use with seismic hazard studies
+(<https://doi.org/10.5066/P9T96Q67>).
 
 ## Installation
 
-Within matlab, add to your path the location of the MinVel matlab scripts. MinVel.m assumes that the database (mentioned above) is installed in NCMBase/database where NCMBase is ../../(Location of MinVel.m). For example, MinVel.m might be located in Path/NCM/MinVel/matlab. The database directory would then be in Path/NCM/database. MinVel.m can be edited to allow for a different location of the database.
+Within matlab, add to your path the location of the MinVel matlab scripts. MinVel.m assumes
+that the database (mentioned above) is installed in NCMBase/database where NCMBase
+is ../../(Location of MinVel.m). For example, MinVel.m might be located in Path/NCM/MinVel/matlab.
+The database directory would then be in Path/NCM/database. MinVel.m can be edited to allow for a
+different location of the database.
 
 ## Example
 
@@ -14,14 +24,20 @@ See example.m for an example.
 
 Please see or query the code for help.
 
-**matlab>> help MinVel**
+### Matlab Help
 
-Any questions regarding the code can be directed to olboyd@usgs.gov.
+Any questions regarding the code can be directed to <olboyd@usgs.gov>.
 
-# References
+## References
 
-*Abers, G.A., and Hacker, B.R., 2016, A MATLAB toolbox and Excel workbook for calculating the densities, seismic wave speeds, and major element composition of minerals and rocks at pressure and temperature: Geochem. Geophys. Geosys., v. 16, p. 616–624.*
+*Abers, G.A., and Hacker, B.R., 2016, A MATLAB toolbox and Excel workbook for calculating the
+densities, seismic wave speeds, and major element composition of minerals and rocks at pressure
+and temperature: Geochem. Geophys. Geosys., v. 16, p. 616–624.*
 
-*Hacker, B.R., and Abers, G.A., 2004, Subduction Factory 3: An Excel worksheet and macro for calculating the densities, seismic wave speeds, and H2O contents of minerals and rocks at pressure and temperature: Geochem. Geophys. Geosys., v. 5, no. Q01005.*
+*Hacker, B.R., and Abers, G.A., 2004, Subduction Factory 3: An Excel worksheet and macro
+for calculating the densities, seismic wave speeds, and H2O contents of minerals and rocks at
+pressure and temperature: Geochem. Geophys. Geosys., v. 5, no. Q01005.*
 
-*Sowers, T., and Boyd, O.S., 2019, Petrologic and mineral physics database for use with the U.S. Geological Survey National Crustal Model: U.S. Geological Survey Open-File Report 2019–1035, 17 p., <https://doi.org/10.3133/ofr20191035>.*
+*Sowers, T., and Boyd, O.S., 2019, Petrologic and mineral physics database for use with the U.S.
+Geological Survey National Crustal Model: U.S. Geological Survey Open-File Report 2019–1035,
+17 p., <https://doi.org/10.3133/ofr20191035>.*
diff --git a/minvel/README.md b/minvel/README.md
index 0f658ea13693dec8c0898653b9b2fd37396c2115..648de7d3e700e8a042d656f066953a44b1be2c88 100644
--- a/minvel/README.md
+++ b/minvel/README.md
@@ -11,7 +11,7 @@ hazard studies (<https://doi.org/10.5066/P9T96Q67>).
 
 ## Prerequisites
 
-* [Python](https://www.python.org/downloads/) 3.6+
+* [Python](https://www.python.org/downloads/) 3.8+
 * [Poetry](https://python-poetry.org/) Python dependency manager
 
 ### Poetry Install
@@ -106,7 +106,7 @@ Please see or query the code for help.
 poetry run help
 ```
 
-Any questions regarding the code can be directed to olboyd@usgs.gov.
+Any questions regarding the code can be directed to <olboyd@usgs.gov>.
 
 ## Development