TY  - RPRT
TI  - Preliminary geologic map of the Dagmar No. 4 quadrangle, Montana-North Dakota
AU  - Irving Jerome Witkind
PY  - 1949
DO  - 10.3133/ofr4911
UR  - https://pubs.usgs.gov/publication/ofr4911
ID  - ofr4911
ER  -