TY  - RPRT
TI  - Coal geology and assessment of coal resources and reserves in the Powder River Basin, Wyoming and Montana
AU  - James A. Luppens
AU  - David C. Scott
AU  - Jon Haacke
AU  - Lee M. Osmonson
AU  - Paul E. Pierce
PY  - 2015
DO  - 10.3133/pp1809
UR  - https://pubs.usgs.gov/publication/pp1809
ID  - pp1809
ER  -