TY  - RPRT
TI  - Aeromagnetic map of the Downingtown quadrangle, Chester County, Pennsylvania
AU  - Randolph Wilson Bromery
AU  - G. L. Zandle
PY  - 1960
DO  - 10.3133/gp224
UR  - https://pubs.usgs.gov/publication/gp224
ID  - gp224
ER  -