TY  - RPRT
TI  - Thickness, percent sand, and configuration of shallow hydrogeologic units in the Powder River basin, Montana and Wyoming
AU  - B. D. Lewis
AU  - W. R. Hotchkiss
PY  - 1981
DO  - 10.3133/i1317
UR  - https://pubs.usgs.gov/publication/i1317
ID  - i1317
ER  -