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The geology and paleontology of the marine Pliocene of San Diego, California. Part 2A, Paleontology (Coelenterata, Bryozoa, Brachiopoda, Echinodermata)
Vol 2, Page 73, Date 1960
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The geology and paleontology of the marine Pliocene of San Diego, California (Paleontology: Pelecypoda)
Vol 2, Page 134, Date 1972