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By "Jackson, Robert Tracy, (1861 - 1948)"
Fossil Echini of the West Indies, by Robert Tracy Jackson. Stratigraphic significance of the species of West Indian fossil Echini, by Thomas Wayland Vaughan.
By: Jackson, Robert Tracy, - Vaughan, Thomas Wayland,
Publication info: Washington :Carnegie Institution of Washington,1922.
Contributed by: University of California Libraries (archive.org)