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	1.	No cover image available Ammonites and some characteristic bivalves from the Upper Cretaceous Frontier Formation, Natrona County, Wyoming / by William A. Cobban by Coban, William Aubrey, 1916- Series: U.S. Geological Survey bulletin ; 1917 Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: Washington, D.C. : United States Government Printing Office 1990 Availability: Items available for loan: National Library of India (1)Call number: U.S. 564.530978793 Co 633. 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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