TY  - RPRT
TI  - Map of slopes and their environmental significance in the Marana quadrangle, Arizona
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1973
DO  - 10.3133/i846a
UR  - https://pubs.usgs.gov/publication/i846A
ID  - i846A
ER  -