TY  - RPRT
TI  - The Foerstia zone of the Ohio and Chattanooga Shales
AU  - James Morton Schopf
AU  - J.F. Schwietering
PY  - 1970
DO  - 10.3133/b1294h
UR  - https://pubs.usgs.gov/publication/b1294H
ID  - b1294H
ER  -