TY  - RPRT
TI  - Preliminary geologic map of the Dillon 1? x 2? Quadrangle, Montana
AU  - Edward Thompson Ruppel
AU  - J.M. O’Neill
AU  - David A. Lopez
PY  - 1983
DO  - 10.3133/ofr83168
UR  - https://pubs.usgs.gov/publication/ofr83168
ID  - ofr83168
ER  -