TY  - RPRT
TI  - Preliminary unevaluated geologic map of the Ledger-Dunkirk area, Pondera and Toole Counties, Montana
AU  - K. H. Holmes
AU  - T. E. Bretz
PY  - 1978
DO  - 10.3133/ofr781041
UR  - https://pubs.usgs.gov/publication/ofr781041
ID  - ofr781041
ER  -