1. Revision of the flora of the Green River formation : with descriptions of new species Author/Creator: Knowlton, Frank Hall, 1860-1926 Publication/Creation: Washington : Govt. print Off, 1923 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 131 A-H. Access & Availability: Loading
2. Revision of the flora of the Green River formation with descriptions of new species Author/Creator: Knowlton, Frank Hall, 1860-1926, author Publication/Creation: [Washington] : [Department of the Interior, United States Geological Survey], [1923] Resource Type: Book Access & Availability: Loading