Preliminary report on coal resources of the Otter Creek EMRIA site, Powder River County, Montana [unknown]

E.J. McKay, Joseph R. Hatch, Edwin R. Landis
1976 Antarctica A Keystone in a Changing World   unpublished
doi:10.3133/ofr76387 fatcat:u5mmorm2wbhlzc3fv3aixjxahq