TY  - RPRT
TI  - Report on the geology and resources of the Black Hills of Dakota
AU  - Henry Newton
AU  - Walter P. Jenney
AU  - John Wesley Powell
PY  - 1880
DO  - 10.3133/70039917
UR  - https://pubs.usgs.gov/publication/70039917
ID  - 70039917
ER  -