Mineral resources in Permian rocks of southwest Montana /

by Swanson, Roger Warren, 1914-
Published 1970

The Phosphoria, Park City and Shedhorn formations in the western phosphate field /

by McKelvey, V. E. (Vincent Ellis), 1916-
Published 1959

Stratigraphy and petrology of the Permian rocks of southwestern Montana /

by Cressman, Earle Rupert, 1923-, Swanson, Roger Warren, 1914-
Published 1964

Mineral resources in Permian rocks of southwest Montana /

by Swanson, Roger Warren, 1914-
Published 1970

Stratigraphic sections of the Phosphoria Formation in Montana, 1947-48 /

by Swanson, Roger Warren, 1914-
Published 1953

Stratigraphic sections of the Phosphoria Formation in Montana, 1948 /

by Klepper, Montis Ruhl, 1915-
Published 1953

Stratigraphic sections of the Phosphoria Formation in Montana, 1951 /

by Peterson, James A., Gosman, Robert F., 1927-, Swanson, Rowena W.
Published 1954

Stratigraphic sections of the Phosphoria Formation, 1953 /

by Swanson, Roger Warren, 1914-
Published 1956

Stratigraphic sections of the Phosphoria Formation in Montana, 1949-50 : Part 1 /

by Cressman, Earle Rupert, 1923-
Published 1953

Stratigraphic sections of the Phosphoria Formation in Montana.

by Swanson, Roger Warren, 1914-
Published 1953