TY  - RPRT
TI  - Geologic map of the Allentown East quadrangle, Lehigh, Northampton, and Bucks Counties, Pennsylvania
AU  - Avery Drake
PY  - 1999
DO  - 10.3133/gq1804
UR  - https://pubs.usgs.gov/publication/gq1804
ID  - gq1804
ER  -