TY  - RPRT
TI  - Stratigraphic framework of the Devonian black shales of the Appalachian Basin
AU  - J.B. Roen
AU  - Wallace De Witt
PY  - 1984
DO  - 10.3133/ofr84111
UR  - https://pubs.usgs.gov/publication/ofr84111
ID  - ofr84111
ER  -