TY  - RPRT
TI  - Preliminary stratigraphic section showing radioactive zones in the Devonian black shales in the southern part of the Appalachian basin
AU  - Roy Clark Kepferle
AU  - E.N. Wilson
AU  - Frank R. Ettensohn
PY  - 1977
DO  - 10.3133/ofr77843
UR  - https://pubs.usgs.gov/publication/ofr77843
ID  - ofr77843
ER  -