TY  - RPRT
TI  - Geologic history of the Colorado River: Chapter C in The Colorado River region and John Wesley Powell (Professional Paper 669)
AU  - Charles B. Hunt
PY  - 1969
DO  - 10.3133/pp669c
UR  - https://pubs.usgs.gov/publication/pp669C
ID  - pp669C
ER  -