TY  - RPRT
TI  - Preliminary stratigraphic cross section showing radioactive zone in the Devonian Black Shales in the western part of the Appalachian Basin
AU  - Laure G. Wallace
AU  - John B. Roen
AU  - Wallace De Witt
PY  - 1977
DO  - 10.3133/oc80
UR  - https://pubs.usgs.gov/publication/oc80
ID  - oc80
ER  -