TY  - RPRT
TI  - Aeromagnetic map of the Birdsboro quadrangle, Berks County, Pennsylvania
AU  - Randolph Wilson Bromery
AU  - J. R. Henderson
AU  - G. L. Zandle
PY  - 1960
DO  - 10.3133/gp231
UR  - https://pubs.usgs.gov/publication/gp231
ID  - gp231
ER  -