TY  - RPRT
TI  - Preliminary geologic map of part of the Edgemont quadrangle, Fall River County, South Dakota, figure 8
AU  - John Donald Ryan
AU  - Roy E. Roadifer
PY  - 1955
DO  - 10.3133/ofr55156
UR  - https://pubs.usgs.gov/publication/ofr55156
ID  - ofr55156
ER  -