TY  - RPRT
TI  - Tonsteins and clay-rich layers in coal-bearing intervals of the Eocene Manning formation, east-central Texas
AU  - Leslie F. Ruppert
AU  - Peter D. Warwick
AU  - Sharon S. Crowley
AU  - James Pontolillo
PY  - 1994
UR  - https://pubs.usgs.gov/publication/70195399
ID  - 70195399
ER  -