Pre-Cambrian rocks of the Lake Superior Region; a review of newly discovered geologic features, with a revised geologic map /
Leith, C. K. 1875-1956.
Pre-Cambrian rocks of the Lake Superior Region; a review of newly discovered geologic features, with a revised geologic map / C. K. Leith, Richard J. Lund and Andrew Leith. - Washington : U.S. Govt. Print. Off., 1935. - ii, 34 p. fold. col. map (in pocket) fold. tables. ; 29 cm.
At head of title: United States Department of the Interior. Bibliography: p. 26-31.
gs 35000188
Geology, Stratigraphic--Precambrian.
Geology--Superior, Lake.
QE75 / .P9 no. 184
Pre-Cambrian rocks of the Lake Superior Region; a review of newly discovered geologic features, with a revised geologic map / C. K. Leith, Richard J. Lund and Andrew Leith. - Washington : U.S. Govt. Print. Off., 1935. - ii, 34 p. fold. col. map (in pocket) fold. tables. ; 29 cm.
At head of title: United States Department of the Interior. Bibliography: p. 26-31.
gs 35000188
Geology, Stratigraphic--Precambrian.
Geology--Superior, Lake.
QE75 / .P9 no. 184