TY  - RPRT
TI  - Volcanic ash dispersed in the Wyodak-Anderson coal bed, Powder River Basin, Wyoming
AU  - Don M. Triplehorn
AU  - R.W. Stanton
AU  - Leslie F. Ruppert
AU  - Sharon S. Crowley
PY  - 1991
DO  - 10.1016/0146-6380(91)90119-5
UR  - https://pubs.usgs.gov/publication/70015609
ID  - 70015609
ER  -