TY  - RPRT
TI  - The Reinhardt Thiessen coal thin-section slide collection of the U.S. Geological Survey; catalog and notes
AU  - James Morton Schopf
AU  - Orrin G. Oftedahl
PY  - 1976
DO  - 10.3133/b1432
UR  - https://pubs.usgs.gov/publication/b1432
ID  - b1432
ER  -