Geological history of the Yellowstone National Park
Hague AA. 1928. Geological history of the Yellowstone National Park. United States Government Printing Office. Washington, DC
The purpose of this paper is not so much to elucidate any special problem connected with the many interesting geological questions to be found in the Yellowstone Park, as to offer such a general view of the region as will enable the tourist to understand clearly something of its physical geography and geology.