TY  - RPRT
TI  - Preliminary geologic map of the Ekalaka 1° x 2° quadrangle, southeastern Montana and western North and South Dakota
AU  - Roger B. Colton
AU  - S. T. Whitaker
AU  - W. C. Ehler
AU  - J. Holligan
AU  - C.G. Bowles
PY  - 1978
DO  - 10.3133/ofr78493
UR  - https://pubs.usgs.gov/publication/ofr78493
ID  - ofr78493
ER  -