TY  - RPRT
TI  - Mississippian stratigraphy of northwestern Pennsylvania
AU  - George R. Schiner
AU  - Grant E. Kimmel
PY  - 1972
DO  - 10.3133/b1331a
UR  - https://pubs.usgs.gov/publication/b1331A
ID  - b1331A
ER  -