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	1.	No cover image available Type sections and stratigraphy of the members of the Blackleaf and Marias River Formations (Cretaceous) of the Sweetgrass arch, Montana : a report of a formal subdivision and age assignments of a classic Cretaceous area / by W. A. Cobban ... [et al.] by Cobban, William Aubrey, 1916- Series: Geological Survey professional paper ; 974 Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: Washington : U.S. Govt. Print. Off., 1976 Availability: Items available for loan: National Library of India (1)Call number: U.S. 551.7709786 C 633 (paper no. 974). Place hold Request article Save to lists
	2.	No cover image available Stratigraphy of Mid-Cretaceous Blackleaf and lower part of the frontier formations in parts of Beaverhead and Madison counties, Montana / by Thaddeus S. Dyman and Douglas J. Nichols by Dyman, T. S Nichols, Douglas J Series: U.S. Geological Survey bulletin ; 1773 Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: Washington, D.C. : U.S. G.P.O., 1988 Availability: Items available for loan: National Library of India (1)Call number: U.S. 551.770978669 D 997. Place hold Request article Save to lists

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