TY  - RPRT
TI  - A Pleistocene ice sheet in the northern Boulder Mountains, Jefferson, Powell, and Lewis and Clark Counties, Montana
AU  - Edward Thompson Ruppel
PY  - 1962
DO  - 10.3133/b1141g
UR  - https://pubs.usgs.gov/publication/b1141G
ID  - b1141G
ER  -