TY  - BOOK
AU  - Henderson,Junius
TI  - The cretaceous formations of northeastern Colorado and the foothills formations of north-central Colorado,
T2  - Colorado. Geological survey. Bulletin 19
AV  - QE91 .A4 no.19
PY  - 1920///
CY  - Denver, Col.
PB  - Eames brothers, state printers
KW  - Geology
KW  - Colorado
KW  - Geology, Stratigraphic
KW  - Cretaceous
N1  - At head of title: Colorado Geological survey, Boulder; Bibliography: p. 53-57, 94-96; Bibliographical foot-notes
ER  -