TY  - RPRT
TI  - Hydrologic Unit Map -- 1974, state of Alabama
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1980
DO  - 10.3133/hu1
UR  - https://pubs.usgs.gov/publication/hu1
ID  - hu1
ER  -