Economic geology of a portion of the basal Duluth complex, Northeastern Minnesota
By: by Richard Gustave Johnson
Published: 1977
Language: eng
Number of pages: 136
Subjects: Geology, Economic -- Minnesota; Geology -- Minnesota -- Duluth Complex
Notes: Photocopy of typescript. Ann Arbor, Mich. : University Microfilms, 1977. -- 20 cm

Thesis--University of Iowa

Bibliography: leaves 132-136