Imlay, R. W. (1980). Middle Jurassic (Bathonian) ammonites from southern Alaska: Studies of Bathonian ammonites from southern Alaska provide correlations with the arctic region in general, with the Pacific coast and western interior regions of North America and with the early Bathonian of some other parts of the world. United States Government Printing Office.
Chicago Style (17th ed.) CitationImlay, Ralph Willard. Middle Jurassic (Bathonian) Ammonites from Southern Alaska: Studies of Bathonian Ammonites from Southern Alaska Provide Correlations with the Arctic Region in General, with the Pacific Coast and Western Interior Regions of North America and with the Early Bathonian of Some Other Parts of the World. Washington: United States Government Printing Office, 1980.
MLA (9th ed.) CitationImlay, Ralph Willard. Middle Jurassic (Bathonian) Ammonites from Southern Alaska: Studies of Bathonian Ammonites from Southern Alaska Provide Correlations with the Arctic Region in General, with the Pacific Coast and Western Interior Regions of North America and with the Early Bathonian of Some Other Parts of the World. United States Government Printing Office, 1980.