Jurassic (Bathonian or early Callovian) ammonites from Alaska and Montana.

Jurassic (Bathonian and Callovian) ammonites in eastern Oregon and western Idaho /
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1981)

Stratigraphic distribution and zonation of Jurassic (Callovian) ammonites in southern Alaska /
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1975)

Middle Jurassic (Bathonian) ammonites from southern Alaska /
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

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

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

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

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

Middle Jurassic (Bajocian and Bathonian) ammonites from northern Alaska /
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1976)

The upper Bajocian and lower Bathonian (Jurassic) ammonite faunas of Oaxaca, Mexico and West-Tethyan affinities /
by: Westermann, Gerd Ernst Gerold, 1927-
Published: (1981)

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

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

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)

The Jurassic ammonite zones of the Soviet Union /
Published: (1988)

Stratigraphy of the Jurassic and Lower Cretaceous rocks and Jurassic ammonites from northern areas of West Pakistan.
by: Fatmi, Ali Nasir
Published: (1972)

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

Lower Jurassic (Pliensbachian and Toarcian) ammonites from eastern Oregon and California /
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1968)

The base of the Upper Jurassic Morrison Formation in east-central Utah /
by: O'Sullivan, Robert Brett, 1923-
Published: (1985)

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

Correlation and nomenclature of some Triassic and Jurassic rocks in south-central Wyoming /
by: Pipiringos, G. N. (George Nicholas), 1918-
Published: (1968)

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

The Jurassic Wanakah and Morrison formations in the Telluride-Ouray-western Black Canyon area of southwestern Colorado /
by: O'Sullivan, Robert Brett, 1923-
Published: (1992)

Upper Jurassic stratigraphy of some adjacent parts of Texas, Louisiana, and Arkansas /
by: Dickinson, Kendell A., 1931-
Published: (1968)

Correlation of the Jurassic formations of parts of Utah, Arizona, New Mexico and Colorado /
by: Baker, Arthur A. (Arthur Alan), 1897-, et al.
Published: (1936)

Jurassic paleobiogeography of the conterminous United States in its continental setting /
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1980)

The Auld Lang Syne Group, of Late Triassic and Jurassic (?) age, north-central Nevada /
by: Burke, D. B., et al.
Published: (1973)

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)

Revisions to stratigraphic nomenclature of Jurassic and Cretaceous rocks of the Colorado Plateau.
Published: (1988)

Jurassic environments /
by: Hallam, A. (Anthony), 1933-
Published: (1975)

Stratigraphy of the uppermost Triassic and the Jurassic rocks of the Navajo country /
by: Harshbarger, J. W. (John William), 1914-
Published: (1957)

Early Cretaceous (Albian) ammonites from the Chitina Valley and Talkeetna Mountains, Alaska.
by: Imlay, Ralph W. (Ralph Willard), 1908-1989
Published: (1960)

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

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

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

Jurassic geology of the world.
by: Arkell, William Joscelyn, 1904-1958
Published: (1956)

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