TY  - RPRT
TI  - The Valley and Ridge Province of eastern Pennsylvania - Stratigraphic and sedimentologic contributions and problems
AU  - Jack B. Epstein
PY  - 2006
DO  - 10.1002/gj.3350210306
UR  - https://pubs.usgs.gov/publication/70014574
ID  - 70014574
ER  -