Geology and ground-water resources of Sheridan County, Kansas ..

بواسطة Bayne, Charles K, Bayne, Charles K
منشور في 1956

Correlation of the Ogallala formation (Neogene) in western Texas with type localities in Nebraska /

بواسطة Frye, John C (John Chapman), 1912-1982, Frye, John C (John Chapman), 1912-1982
منشور في 1959