TY  - RPRT
TI  - Land use and land cover, 1972-73, Ajo, Arizona
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1979
DO  - 10.3133/l39
UR  - https://pubs.usgs.gov/publication/l39
ID  - l39
ER  -