TY  - RPRT
TI  - Hydrologic Unit Map -- 1974, state of Arizona
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1975
DO  - 10.3133/hu3
UR  - https://pubs.usgs.gov/publication/hu3
ID  - hu3
ER  -