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Publication Extents

Not all publications have extents, not all extents are completely accurate
The geologic story of Yellowstone National Park
William Richard Keefer
1971, Bulletin 1347
In the aftermath of the Civil War, the United States expanded the exploration of her western frontiers to gain a measure of the vast lands and natural resources in the region now occupied by our Rocky Mountain States. As part of this effort, the Geological and Geographical Survey of the...