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Berry, Edward W. (1918) The Fossil higher plants from the Canal Zone. Washington, DC, Govt. Printing Office, (Bulletin (United States National Museum), 103(p)
Rathbun, Mary J. (1918) Contributions to the geology and paleontology of the Canal Zone, Panama, and geologically related areas in Central America and the West Indies. Decapod crustaceans from the Panama region. Bulletin United States National Museum, 103(7), 123-184 & pls.