21. Concepcion and Palma Escrita Formations, western Puerto Rico Author/Creator: McIntyre, David H. Publication/Creation: Washington : U.S. Govt. Print. Off, 1974 Resource Type: Book Access & Availability: Loading
22. Concepcion and Palma Escrita Formations, western Puerto Rico Author/Creator: McIntyre, David H., author Publication/Creation: [Washington, D.C.] : United States Department of the Interior, U.S. Geological Survey, 1974 Resource Type: Book Access & Availability: Loading
23. Contribution to the study of Ostracoda with special reference to the Tertiary and Cretaceous microfauna of the Carribean region Author/Creator: Van den Bold, W. A. (Willem Aaldert) Publication/Creation: Lochem, Netherlands : Antiquriaat Junk, 1970 Resource Type: Book Access & Availability: Loading
24. Contributions to geology Author/Creator: Lea, Isaac, 1792-1886 Publication/Creation: Philadelphia : Carey, Lea and Blanchard, 1833 Resource Type: Book Access & Availability: Loading
25. Contributions to the geology and paleontology of the West Indies Author/Creator: Vaughan, Thomas Wayland, 1870-1952 Publication/Creation: [Washington] : Carnegie institution of Washington, 1919 Resource Type: Book Access & Availability: Loading
26. Contributions to the Tertiary geology and paleontology of the United States Author/Creator: Heilprin, Angelo, 1853-1907 Publication/Creation: Philadelphia : The author, 1884 Resource Type: Book Access & Availability: Loading
27. Contributions to the Tertiary paleontology of the Pacific coast. 1, The Miocene of Astoria and Coos Bay, Oregon Author/Creator: Dall, William Healey, 1845-1927, author Publication/Creation: Washington : Department of the Interior, United States Geological Survey, 1909 Resource Type: Book Access & Availability: Loading
28. Contributions to the Tertiary paleontology of the Pacific coast : I. The Miocene of Astoria and Coos Bay, Oregon Author/Creator: Dall, William Healey, 1845-1927 Publication/Creation: Washington : Govt. Print. Off, 1909 Resource Type: Book Access & Availability: Loading
29. Correlation between Tertiary mammal horizons of Europe and America : an introduction to the more exact investigation of Tertiary zoögeography. Preliminary study with third trial sheet Author/Creator: Osborn, Henry Fairfield, 1857-1935 Publication/Creation: New York : New York Academy of Sciences, 1900 Resource Type: Book Is Part Of: Annals of the New York Academy of Sciences, v. 13. Access & Availability: Loading
30. The correlation of the Vicksburg group, Author/Creator: Cooke, C. Wythe 1887-1971. (Charles Wythe) Publication/Creation: Washington : Govt. Print. Off, 1923 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 132-137. Access & Availability: Loading