Pilsbry, H. A. (1908-1910). Manual of conchology, structural and systematic, with illustrations of the species. Ser. 2, Pulmonata. Vol. 20: Caecilioides, Glessula and Partulidae. pp i-viii, 1-326, pls 1-43. Philadelphia, published by the Conchological Department, Academy of Natural Sciences. [pp. 1-64, pls 1-10, 19 Nov. 1908; pp. 65-154, pls 11-21, 18 May 1909; pp. 155-314, pls 22-36, 29 Sept. 1909; pp. i-viii, 315-326, pls 37-43, 23 March 1910].
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Pilsbry, H. A.
1908-1910
<i>Manual of conchology, structural and systematic, with illustrations of the species</i>. Ser. 2, Pulmonata. Vol. 20: <i>Caecilioides, Glessula</i> and Partulidae. pp i-viii, 1-326, pls 1-43. Philadelphia, published by the Conchological Department, Academy of Natural Sciences. [pp. 1-64, pls 1-10, 19 Nov. 1908; pp. 65-154, pls 11-21, 18 May 1909; pp. 155-314, pls 22-36, 29 Sept. 1909; pp. i-viii, 315-326, pls 37-43, 23 March 1910]