The spearfish formation in the Williston Basin of western North Dakota
By: by Wallace G. Dow.
Series: North Dakota. Geological Survey. Bulletin; 52; Bulletin (North Dakota Geological Survey) ;; 52.
Published: 1967
Place of publication: Grand Forks, N.D
Language: eng
Number of pages: 28
Subjects: Geology -- North Dakota.; Geology -- Williston Basin.; Geology, Stratigraphic -- Permian.; Geology, Stratigraphic -- Triassic.
Notes: Bibliography: p. 27-28.
Part of the illustrative matter fold. in pocket.