Bechler, G. R. (1872). Map of the sources of Snake River: With its tributaries, together with portions of the headwaters of the Madison and Yellowstone from surveys and observations of the Snake River Expedition. U.S. Geological Survey of the Territories.
Chicago-Zitierstil (17. Ausg.)Bechler, Gustavus R. Map of the Sources of Snake River: With Its Tributaries, Together with Portions of the Headwaters of the Madison and Yellowstone from Surveys and Observations of the Snake River Expedition. [Washington, D.C.]: U.S. Geological Survey of the Territories, 1872.
MLA-Zitierstil (9. Ausg.)Bechler, Gustavus R. Map of the Sources of Snake River: With Its Tributaries, Together with Portions of the Headwaters of the Madison and Yellowstone from Surveys and Observations of the Snake River Expedition. U.S. Geological Survey of the Territories, 1872.