TY  - RPRT
TI  - Aeromagnetic map of the Valley Forge quadrangle, Chester, Montgomery, and Delaware Counties, Pennsylvania
AU  - Randolph Wilson Bromery
AU  - G. L. Zandle
PY  - 1959
DO  - 10.3133/gp200
UR  - https://pubs.usgs.gov/publication/gp200
ID  - gp200
ER  -