TY - RPRT TI - Preliminary report on coal resources of the Otter Creek EMRIA site, Powder River County, Montana AU - E. J. McKay AU - Joseph R. Hatch AU - Edwin R. Landis PY - 1976 DO - 10.3133/ofr76387 UR - https://pubs.usgs.gov/publication/ofr76387 ID - ofr76387 ER -