TY  - RPRT
TI  - A method of converting no-flow cells to variable-head cells for the U. S. Geological Survey modular finite-difference ground-water flow model
AU  - Michael G. McDonald
AU  - Arlen W. Harbaugh
AU  - Brennon R. Orr
AU  - Daniel J. Ackerman
PY  - 1991
DO  - 10.3133/ofr91536
UR  - https://pubs.usgs.gov/publication/ofr91536
ID  - ofr91536
ER  -