institute on lake superior geology

proceedings of the institute on lake superior geology, university of minnesota, april 1-2 1955.

institute on lake superior geology: geological exploration. michigan institute of mining and technology, houghton, michigan, may 11-12, 1956.

proceedings of the institute on lake superior geology. university of minnnesota, duluth, minnesota. april 21-22, 1958.

proceedings of the institute on lake superior geology. university of minnesota, minneapolis, minnesota. april 13-14, 1959.

institute on lake superior geology, university of wisconsin, madison, wisconsin. april 14-15, 1960

institute on lake superior geology, lakehead branch - canadian institute of mining & metallurgy, port arthur, ontario. april 27-29, 1961

institute on lake superior geology. michigan college of mining & technology, houghton, michigan. may 10-12, 1962

institute on lake superior geology. university of minnestota, duluth, minnesota, may 2-3, 1963

institute on lake superior geology. university of minnestota, duluth, minnesota, may 2-3, 1963

institute on lake superior geology. ishpeming, michigan. may 6-9, 1964.

collection items