Imlay, R. W. (1981). Late Jurassic ammonites from Alaska: Studies of the Late Jurassic ammonites of Alaska enables fairly close age determinations and correlations to be made with Upper Jurassic ammonite and stratigraphic sequences elsewhere in the world. U.S. G.P.O.
Chicago-Zitierstil (17. Ausg.)Imlay, Ralph Willard. Late Jurassic Ammonites from Alaska: Studies of the Late Jurassic Ammonites of Alaska Enables Fairly Close Age Determinations and Correlations to Be Made with Upper Jurassic Ammonite and Stratigraphic Sequences Elsewhere in the World. Washington, DC: U.S. G.P.O, 1981.
MLA-Zitierstil (9. Ausg.)Imlay, Ralph Willard. Late Jurassic Ammonites from Alaska: Studies of the Late Jurassic Ammonites of Alaska Enables Fairly Close Age Determinations and Correlations to Be Made with Upper Jurassic Ammonite and Stratigraphic Sequences Elsewhere in the World. U.S. G.P.O, 1981.