TY  - RPRT
TI  - Preliminary stratigraphic cross section showing radioactive zones in the Devonian black shales in eastern Ohio and west-central Pennsylvania
AU  - John B. Roen
AU  - Laure G. Wallace
AU  - Wallace De Witt
PY  - 1978
DO  - 10.3133/oc82
UR  - https://pubs.usgs.gov/publication/oc82
ID  - oc82
ER  -