Succession and speciation of the pelecypod Aucella /

Middle Bajocian ammonites from the Cook Inlet region, Alaska /
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1964)

Late Bajocian ammonites from the Cook Inlet region, Alaska /
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1962)

Paleontology of the Jurassic and Cretaceous of west central Argentina /
by: Weaver, Charles Edwin, 1880-
Published: (1931)

Late Jurassic ammonites from the western Sierra Nevada, California /
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1961)

The age of dinosaurs.
by: Kurtén, Björn
Published: (1968)

Ammonites of early cretaceous age (Valanginian and Hauterivian) from the Pacific coast states.
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1960)

The Mesozoic pelecypods Otapiria Marwick and Lupherella Imlay, new genus, in the United States /
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1967)

Amonitas del Jurasico Superior y del Cretacico Inferior del extremo oriental del Estado de Durango, Mexico.
by: Peña Muñoz, Magdalena Josefina
Published: (1964)

Late Jurassic ammonites from Alaska /
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1981)

Jurassic (Bathonian and Callovian) ammonites in eastern Oregon and western Idaho /
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1980)

Middle Jurassic (Bajocian and Bathonian) ammonites from northern Alaska /
by: Imlay, Ralph W. (Ralph Willard), 1908-1989

Late Bajocian ammonites from southern Alaska /
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1982)

Early and middle Bajocian (middle Jurassic) ammonites from southern Alaska /
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1985)

Middle Jurassic (Bathonian) ammonites from southern Alaska /
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1980)

Marine Jurassic pelecypods from central and southern Utah /
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1964)

Jurassic (Oxfordian and Late Callovian) ammonites from the western interior region of the United States /
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1982)

Some Jurassic ammonites from central Saudi Arabia /
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1970)

Early Jurassic ammonites from Alaska /
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1981)

Callovian (Jurassic) ammonites from the United States and Alaska. : Descriptions and illustrations of cephalopods of Late Jurassic age.
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1953)

Characteristic marine Jurassic fossils from the western interior of the United States.
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1948)

Ostracodes from the upper part of the Sundance Formation of South Dakota, Wyoming and Southern Montana /
by: Swain, Frederick M. (Frederick Morrill), 1916-2008, et al.
Published: (1952)

The late Cretaceous ammonites Scaphites leei Reeside and Scaphites hippocrepis (DeKay) in the western interior of the United States /
by: Cobban, William A., 1916-2015
Published: (1969)

Upper Cretaceous (Campanian and Maestrichtian) ammonites from southern Alaska.
by: Jones, David Lawrence, 1930-
Published: (1963)

Cretaceous ammonites from the lower part of the Matanuska formation, southern Alaska /
by: Jones, David Lawrence, 1930-
Published: (1967)

Stratigraphy of the Niobrara formation at Pueblo, Colorado /
by: Scott, Glenn R., 1918-2012, et al.
Published: (1964)

American upper cretaceous echinoidea.
by: Cooke, C. Wythe (Charles Wythe), 1887-1971
Published: (1953)

Shorter contributions to paleontology and stratigraphy /
Published: (1991)

The cephalopods of the Eagle sandstone and related formations in the western interior of the United States /
by: Reeside, John B. (John Bernard), 1889-1958
Published: (1927)

New Upper Cretaceous Ostreidae from the Gulf region.
by: Stephenson, Lloyd William, 1876-1962
Published: (1936)

The Upper Cretaceous ammonite Watinoceras Warren in the western interior of the United States /
by: Cobban, William A., 1916-2015
Published: (1988)

The flora of the Denver and associated formations of Colorado /
by: Knowlton, Frank Hall, 1860-1926
Published: (1930)

The Lower Cretaceous ammonite Schloenbachia leonensis Conrad var. equidistans Cragin /
by: Cobban, William A., 1916-2015
Published: (1985)

Twin Creek limestone (Jurassic) in the western interior of the United States /
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1967)

Tertiary marine pelecypods of California and Baja California : Plicatulidae to Ostreidae /
by: Moore, Ellen James
Published: (1987)

Upper cretaceous foraminifera of the gulf coastal region of the United States and adjacent areas /
by: Cushman, Joseph A.
Published: (1946)

The fauna of the Ripley formation on Coon creek, Tennessee /
by: Wade, Bruce, 1889-
Published: (1926)