TY  - RPRT
TI  - Eighth Annual report of the United States Geological Survey to the Secretary of the Interior, 1886-1887: Part 2
AU  - J. W. Powell
PY  - 1889
DO  - 10.3133/ar8_2
UR  - https://pubs.usgs.gov/publication/ar8_2
ID  - ar8_2
ER  -