TY  - RPRT
TI  - Geology and mineral resources of the Quakertown-Doylestown district, Pennsylvania and New Jersey
AU  - Florence Bascom
AU  - Edgar Theodore Wherry
AU  - George W. Stose
AU  - A. I. Jonas
PY  - 1931
DO  - 10.3133/b828
UR  - https://pubs.usgs.gov/publication/b828
ID  - b828
ER  -