TY  - RPRT
TI  - Surficial geologic map of part of the Allentown 30' x 60' quadrangle, Berks, Bucks, Carbon, Lehigh, Luzerne, Monroe, Northampton, and Schuylkill Counties, Pennsylvania
AU  - D. D. Braun
AU  - J. B. Epstein
PY  - 1993
DO  - 10.3133/ofr93723
UR  - https://pubs.usgs.gov/publication/ofr93723
ID  - ofr93723
ER  -