TY  - RPRT
TI  - Land use and land cover and associated maps for Pittsburgh, Pennsylvania
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1977
DO  - 10.3133/ofr77110
UR  - https://pubs.usgs.gov/publication/ofr77110
ID  - ofr77110
ER  -