TY  - RPRT
TI  - Land use and land cover and associated maps for Baltimore, Maryland; Pennsylvania, Virginia, West Virginia
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1977
DO  - 10.3133/ofr77666
UR  - https://pubs.usgs.gov/publication/ofr77666
ID  - ofr77666
ER  -