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Start Over Spatial Coverage Lewis and Clark County.

1. Helena mining region, Montana [cartographic material]

Yale Public content
1919. 2012-04-05T20:29:38Z. 2012-05-03T15:37:23Z. Ropes, Leverett S. (Leverett Smith), 1868-1953. L.S. Ropes & Margurite Greenfield. English. Public. Montana, Lewis and Clark County., and Montana, Southwestern.

2. Reconnaissance geologic map of the Big Fork-Avon environmental study area, Flathead, Lake, Lewis and Clark, Missoula, and Powell counties, Montana [cartographic material]

Yale Public content
1982. 2016-01-06T18:26:48Z. 2016-07-13T21:10:12Z. Witkind, Irving Jerome, 1917-. The Survey. English. cartographic image. Public. Montana, Flathead County, Lake County, Lewis and Clark County, Missoula County, Powell County, U.S., Flathead County., Lake County., Lewis and Clark County., Missoula County., and Powell County.