"Coal Montana Rosebud County." . . "Montana" . . "Geological Survey (U.S.)," . . . . "Geology Montana Powder River County." . . "Coal Montana Powder River County." . . "Geology Montana Rosebud County." . . "Geology." . . . . "Reconnaissance geology of the Birney-Broadus coal field, Rosebud and Powder River Counties, Montana" . "A description of 15 coal beds and reserves of coal in an area of 850 square miles in southeastern Montana." . "Reconnaissance geology of the Birney-Broadus coal field, Rosebud and Powder River Counties, Montana"@en . . . . . . . . . . . . . . "Reconnaissance Geology of the Birney-Broadus coal field, Rosebud and powder River Counties, Montana" . . . . . "Reconnaissance geology of the Birney-Broadus Coal Field, Rosebud and Powder River Counties, Montana"@en . . "Contributions to economic geology"@en . . "Coal." . .