TY  - RPRT
TI  - Preliminary geologic map of the Barker (7 1/2') quadrangle, Judith Basin and Cascade Counties, Montana
AU  - Irving J. Witkind
PY  - 1969
DO  - 10.3133/ofr69320
UR  - https://pubs.usgs.gov/publication/ofr69320
ID  - ofr69320
ER  -