TY  - RPRT
TI  - Aeromagnetic map of the Elverson quadrangle, Berks and Chester Counties, Pennsylvania
AU  - Randolph Wilson Bromery
AU  - John R. Henderson
AU  - G. L. Zandle
PY  - 1959
DO  - 10.3133/gp221
UR  - https://pubs.usgs.gov/publication/gp221
ID  - gp221
ER  -