Author: Pilsbry H.A. & Olsson A.A.,
Title: Tertiary fresh-water mollusks of the Magdalena Embayment, Colombia with Tertiart stratigraphy of the Middsle Magadlena Valley by O
Description: 1935. C. Wheeler. In 8vo, offp., pp. 33 + 4 pls. Proceedings of the Academy of Natural Sciences, 87. Signed by Axel Olsson

Keywords: shells fossil paleontology geology


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