Early Cretaceous (Albian) Ammonites from the Chitina Valley and Talkeetna Mountains, Alaska /

Autor Imlay, Ralph W. 1908-1989
Vydáno 1960

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

Autor Imlay, Ralph W. 1908-1989
Vydáno 1962

Late Jurassic ammonites from the western Sierra Nevada, California /

Autor Imlay, Ralph W. 1908-1989
Vydáno 1961

Late Bajocian ammonites from the Cook Inlet region, Alaska /

Autor Imlay, Ralph W. 1908-1989
Vydáno 1962

Late Bajocian ammonites from the Cook Inlet region, Alaska : description and illustrations of cephalopods of Middle Jurassic (middle Bajocian) age /

Autor Imlay, Ralph W. 1908-1989
Vydáno 1964