APA (7th ed.) Citation

Ruppel, E. T. (1962). A pleistocene ice sheet in the northern Boulder Mountains, Jefferson, Powell, and Lewis and Clark Counties, Montana. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Ruppel, Edward Thompson. A Pleistocene Ice Sheet in the Northern Boulder Mountains, Jefferson, Powell, and Lewis and Clark Counties, Montana. Washington, D.C.: United States Department of the Interior, Geological Survey, 1962.

MLA (9th ed.) Citation

Ruppel, Edward Thompson. A Pleistocene Ice Sheet in the Northern Boulder Mountains, Jefferson, Powell, and Lewis and Clark Counties, Montana. United States Department of the Interior, Geological Survey, 1962.