Sellards, E. H., W. S. Adkins & F. B. Plummer. (1933). The Geology of Texas. Volume I: Stratigraphy. <em>Bulletin of the University of Texas.</em> 3232: 1007 pp, 10 pls. page(s): 813, pl. 9, fig. 11 [details]
MolluscaBase eds. (2024). MolluscaBase. Plejona (Volutocorbis) olssoni F. B. Plummer, 1933 †. Accessed at: https://www.molluscabase.org/aphia.php?p=taxdetails&id=1637231 on 2024-04-28
original descriptionSellards, E. H., W. S. Adkins & F. B. Plummer. (1933). The Geology of Texas. Volume I: Stratigraphy. <em>Bulletin of the University of Texas.</em> 3232: 1007 pp, 10 pls. page(s): 813, pl. 9, fig. 11 [details]
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