TY  - RPRT
TI  - Aeromagnetic map of northern Frederick County, Maryland, and parts of adjacent counties in Maryland and Pennsylvania
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1973
DO  - 10.3133/ofr73291
UR  - https://pubs.usgs.gov/publication/ofr73291
ID  - ofr73291
ER  -