00979cam a22002651 4500 gs 21000130 DLC 20260227111325.0 790212s1920 couab b s000 0 eng c gs 21000130 (OCoLC)4645682 U.S. Geol. survey Library MiDW DLC premarc QE91 .A4 no.19 Henderson, Junius, 1865-1937. The cretaceous formations of northeastern Colorado and the foothills formations of north-central Colorado, by Junius Henderson. Denver, Col., Eames brothers, state printers, 1920. 98 p. illus., fold. map (in pocket) 23 cm. Colorado. Geological survey. Bulletin 19 At head of title: Colorado Geological survey, Boulder ... Bibliography: p. 53-57, 94-96. Bibliographical foot-notes. Geology Colorado. Geology, Stratigraphic Cretaceous. 26081 26081