Pilsbry, H. A. (1916-1918). Manual of conchology, structural and systematic, with illustrations of the species. Ser. 2, Pulmonata. Vol. 24: Pupillidae (Gastrocoptinae). pp 1-380, pls 1-49. Philadelphia, published by the Conchological Section, Academy of Natural Sciences. [pp. 1-112, Pl. 1-13, 18 Dec 1916; pp. 113-176, pl. 14-29, 18 July 1917; pp. 177-256, pl. 30-38, 09 Nov 1917; pp. 257-380, i-xii, pl. 39-49, 24 April 1918].
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Pilsbry, H. A.
1916-1918
<i>Manual of conchology, structural and systematic, with illustrations of the species</i>. Ser. 2, Pulmonata. Vol. 24: Pupillidae (Gastrocoptinae). pp 1-380, pls 1-49. Philadelphia, published by the Conchological Section, Academy of Natural Sciences. [pp. 1-112, Pl. 1-13, 18 Dec 1916; pp. 113-176, pl. 14-29, 18 July 1917; pp. 177-256, pl. 30-38, 09 Nov 1917; pp. 257-380, i-xii, pl. 39-49, 24 April 1918]