TY  - RPRT
TI  - Hydrologic Unit Map-1978, state of South Dakota
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1978
DO  - 10.3133/hu41
UR  - https://pubs.usgs.gov/publication/hu41
ID  - hu41
ER  -