TY  - RPRT
TI  - Aeromagnetic map of the Columbia east quadrangle, Lancaster County, Pennsylvania
AU  - Randolph Wilson Bromery
AU  - G. L. Zandle
AU  - and others
PY  - 1961
DO  - 10.3133/gp258
UR  - https://pubs.usgs.gov/publication/gp258
ID  - gp258
ER  -