TY - RPRT TI - Diagrams showing correlation of Paleocene coal beds underlying the Birney 1 degree x 1/2 degree quadrangle, Big Horn, Rosebud, and Powder River Counties, Montana AU - William Craven Culbertson PY - 1980 DO - 10.3133/ofr80666 UR - https://pubs.usgs.gov/publication/ofr80666 ID - ofr80666 ER -