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Succession and speciation of the Pelecypod Aucella / by Ralph W. Imlay.
by Imlay, Ralph Willard, 1908-1989. Material type:  Book Publisher: Washington : United States Government Printing Office, 1959Availability: Items available for loan: Biblioteca Aranzadi [Call number: 564.8 IML] (1).
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Ammonites of early cretaceous age (Valanginian and Hauterivian) from The Pacific coast statesss / by Ralph W. Imlay.
by Imlay, Ralph Willard, 1908-1989. Material type: Book Publisher: Washington : United States Government Printing Office, 1960Availability: Items available for loan: Biblioteca Aranzadi [Call number: 564.53(73) IML] (1).
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Characteristic lower Cretaceous megafossils from northern Alaska / by Ralph W. Imlay.
by Imlay, Ralph Willard, 1908-1989. Material type: Book Publisher: Washington : United States Government Printing Office, 1961Availability: Items available for loan: Biblioteca Aranzadi [Call number: 551.763(798) IML] (1).
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Early Cretaceous (Albian) Ammonites from the Chitina valley and Talkeetna Mountains, Alaska / by Ralph W. Imlay.
by Imlay, Ralph Willard, 1908-1989. Material type: Book Publisher: Washington : United States Government Printing Office, 1960Availability: Items available for loan: Biblioteca Aranzadi [Call number: 564.53(798) IML] (1).
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Jurassic (Bathonian or early Callovian) Ammonites from Alaska and Montana / by Ralph W. Imlay.
by Imlay, Ralph Willard, 1908-1989. Material type: Book Publisher: Washington : United States Government Printing Office, 1962Availability: Items available for loan: Biblioteca Aranzadi [Call number: 564.53(786+798) IML] (1).
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Late Jurassic Ammonites from the western Sierra Nevada, California / by Ralph W. Imlay.
by Imlay, Ralph Willard, 1908-1989. Material type: Book Publisher: Washington : United States Government Printing Office, 1961Availability: Items available for loan: Biblioteca Aranzadi [Call number: 564.53(794) IML] (1).
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Late Bajocian ammonites from the cook Inlet region, Alaska / by Ralph W. Imlay.
by Imlay, Ralph Willard, 1908-1989. Material type: Book Publisher: Washington : United States Government Printing Office, 1962Availability: Items available for loan: Biblioteca Aranzadi [Call number: 564.53(798) IML] (1).
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Middle bajocian ammonites from the cook inlet region Alaska / by Ralph W. Imlay.
by Imlay, Ralph Willard, 1908-1989. Material type: Book Publisher: Washington : United States Government Printing Office, 1964Availability: Items available for loan: Biblioteca Aranzadi [Call number: 564.53(798) IML] (1).
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Marine Jurassic Pelecypods from central and southern Utah / by Ralph W. Imlay.
by Imlay, Ralph Willard, 1908-1989. Material type: Book Publisher: Washington : United States Government Printing Office, 1964Availability: Items available for loan: Biblioteca Aranzadi [Call number: 564.1(792) IML] (1).
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Upper Jurassic mollusks from eastern Oregon and Western Idaho / by Ralph W. Imlay.
by Imlay, Ralph Willard, 1908-1989. Material type: Book Publisher: Washington : United States Government Printing Office, 1964Availability: Items available for loan: Biblioteca Aranzadi [Call number: 564(795/796)"6152" IML] (1).
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Some Jurassic ammonites from Central Saudi Arabia / by Ralph W. Imlay.
by Imlay, Ralph Willard, 1908-1989. Material type: Book Publisher: Washington : United States Government Printing Office, 1970Availability: Items available for loan: Biblioteca Aranzadi [Call number: 564.53(532)"6152" IML] (1).
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Structural and stratigraphic significance of the Buchia zones in the Colyer springs-Paskenta area California / by David L. Jones, Edgar H. Bailey and Ralph W. Imlay.
by Jones, David Lewis, 1930-2007 | Bailey, Edgar H, 1914-1983 | Imlay, Ralph Willard, 1908-1989. Material type: Book Publisher: Washington : United States Government Printing Office, 1969Availability: Items available for loan: Biblioteca Aranzadi [Call number: 551.7(794) JON] (1).
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Ammonites from the Buchia zones in northwestern California and Southwestern Oregon / by Ralph W. Imlay and David L. Jones.
by Imlay, Ralph Willard, 1908-1989 | Jones, David Lewis, 1930-2007. Material type: Book Publisher: Washington : United States Government Printing Office, 1970Availability: Items available for loan: Biblioteca Aranzadi [Call number: 564.53(794/795) IML] (1).
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