TY  - RPRT
TI  - Survey of the Colorado River of the West: Letter from the Secretary of the Smithsonian Institution, transmitting report preliminary for continuing the survey of the Colorado of the West and its tributaries
AU  - John Wesley Powell
PY  - 1872
DO  - 10.3133/70039905
UR  - https://pubs.usgs.gov/publication/70039905
ID  - 70039905
ER  -