TY  - RPRT
TI  - Eighth annual report of the United States Geological Survey to the Secretary of the Interior, 1886-1887: Part 1
AU  - J. W. Powell
PY  - 1889
DO  - 10.3133/ar8
UR  - https://pubs.usgs.gov/publication/ar8
ID  - ar8
ER  -