Pilina unguis (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Pilina unguis" in English language version.

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archive.org

(in Latin) Angelin N. P. & Lindström G. 1880. Fragmenta Silurica e dono Caroli Henrici Wegelin. Opus studio Nicolai Petri Angelin Inchoatum Jussu et Impensis Academiae Regiae Scientarum Suecicae. Samson & Wallin (Holmiae), 60 pp. Page 16, plate 2, figure 10-15.
Lindström G. 1884. On the Silurian Gastropoda and Pteropoda of Gotland. Stockholm, 250 pp. Pages 56-57, Plate 1, figure 33-37; plate 19, figure 2.

books.google.com

Moore J. & Raith Overhill R. 2006. An introduction to the invertebrates, Second Edition. Cambridge, Cambridge University. Press, 319 pp. ISBN 0-521-85736-8. Page 126.