TY  - RPRT
TI  - Aeromagnetic and generalized geologic map of southeastern Pennsylvania
AU  - R. W. Bromery
AU  - Andrew Griscom
PY  - 1967
DO  - 10.3133/gp577
UR  - https://pubs.usgs.gov/publication/gp577
ID  - gp577
ER  -