TY  - RPRT
TI  - Aeromagnetic map of Montgomery County, Maryland
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1974
DO  - 10.3133/ofr74208
UR  - https://pubs.usgs.gov/publication/ofr74208
ID  - ofr74208
ER  -