TY  - RPRT
TI  - Land use and land cover and associated maps for Grand Canyon, Arizona
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1979
DO  - 10.3133/ofr791494
UR  - https://pubs.usgs.gov/publication/ofr791494
ID  - ofr791494
ER  -