The cretaceous formations of northeastern Colorado and the foothills formations of north-central Colorado,

by Henderson, Junius, 1865-1937, Henderson, Junius, 1865-1937
Published 1920

Reconnaissance of the geology of the Rabbit Ears region, Routt, Grand, and Jackson counties, Colorado,

by Grout, Frank F (Frank Fitch), 1880-1958, Grout, Frank F (Frank Fitch), 1880-1958, Grout, Frank F (Frank Fitch), 1880, Henderson, Junius, 1865-1937, Worcester, Philip G (Philip George), 1884-1970
Published 1913

Reconnaissance of the geology of the Rabbit Ears region : Routt, Grand, and Jackson counties, Colorado /

by Grout, Frank F (Frank Fitch), 1880-1958, Henderson, Junius, 1865-1937, Worcester, Philip G (Philip George), 1884-1970
Published 1913

Reconnaissance of the geology of the Rabbit Ears region, Routt, Grand, and Jackson counties, Colorado /

by Grout, Frank F (Frank Fitch), 1880-
Published 1913