Stratigraphy and Petrology of the Type Fond du Lac Formation Duluth, Minnesota.
Morey, G. B.
Stratigraphy and Petrology of the Type Fond du Lac Formation Duluth, Minnesota. - Minneapolis : University of Minnesota, 1967. - iii, 35 p. : plat. ; 18 cm. - Geological survey. Report of investigations. ; 7 .
Stratigraphy and Petrology of the Type Fond du Lac Formation Duluth, Minnesota. - Minneapolis : University of Minnesota, 1967. - iii, 35 p. : plat. ; 18 cm. - Geological survey. Report of investigations. ; 7 .