Coal drilling during 1979 in Williams County, North Dakota, and in Beaverhead, Big Horn, Dawson, Fallon, Garfield, McCone, Musselshell, Powder River, Prairie, Roosevelt, Rosebud, and Wibaux counties, Montana
by U.S. Geological Survey and Montana Bureau of Mines and Geology
Other Title
Coal drilling during 1979 in Williams County, North Dakota, and in Beaverhead, Big Horn, Dawson, Fallon, Garfield, McCone, Musselshell, Powder River, Prairie, Roosevelt, Rosebud, and Wibaux counties, Montana