TY  - RPRT
TI  - Bedrock geologic map of the Allentown West quadrangle, Lehigh and Berks counties, Pennsylvania
AU  - Avery Ala Drake
PY  - 1993
DO  - 10.3133/gq1727
UR  - https://pubs.usgs.gov/publication/gq1727
ID  - gq1727
ER  -