TY  - RPRT
TI  - User's guide to the Variably Saturated Flow (VSF) process to MODFLOW
AU  - R. Brad Thoms
AU  - Richard L. Johnson
AU  - Richard W. Healy
PY  - 2006
DO  - 10.3133/tm6a18
UR  - https://pubs.usgs.gov/publication/tm6A18
ID  - tm6A18
ER  -