1. A catalogue of the Cretaceous and Tertiary plants of North America Author/Creator: Knowlton, Frank Hall, 1860-1926, author Publication/Creation: Washington, D.C. : Department of the Interior, United States Geological Survey, 1898 Resource Type: Book Access & Availability: Loading
2. Correlation papers : Eocene Author/Creator: Clark, William Bullock, 1860-1917, author Publication/Creation: Washington, D.C. : Department of the Interior, United States Geological Survey, 1891 Resource Type: Book Access & Availability: Loading
3. Correlation papers : Neocene Author/Creator: Dall, William Healey, 1845-1927, author Publication/Creation: Washington, D.C. : Department of the Interior, United States Geological Survey, 1892 Resource Type: Book Access & Availability: Loading