TY  - RPRT
TI  - The Chinle (Upper Triassic) and Sundance (Upper Jurassic) Formations in north-central Colorado
AU  - G. N. Pipiringos
AU  - W. J. Hail
AU  - G. A. Izett
PY  - 1969
DO  - 10.3133/b1274n
UR  - https://pubs.usgs.gov/publication/b1274N
ID  - b1274N
ER  -