TY  - RPRT
TI  - Aeromagnetic map of parts of the Harrisburg and Baltimore 1 °by 2° quadrangles, Pennsylvania
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1974
DO  - 10.3133/ofr7413
UR  - https://pubs.usgs.gov/publication/ofr7413
ID  - ofr7413
ER  -