TY  - RPRT
TI  - Reconnaissance map of the Dewey Area, Weston and Niobrara counties, Wyoming, and Custer and Fall River counties, South Dakota
AU  - J.D. Northrop
PY  - 1939
DO  - 10.3133/ofr3913
UR  - https://pubs.usgs.gov/publication/ofr3913
ID  - ofr3913
ER  -