TY  - RPRT
TI  - Reconnaissance study of the thickness of the unsaturated zone in the western conterminous United States
AU  - M. S. Bedinger
AU  - William H. Langer
PY  - 1990
DO  - 10.3133/ha715
UR  - https://pubs.usgs.gov/publication/ha715
ID  - ha715
ER  -