Bondesen, P. (1950). A comparative morphological-biological analysis of the egg capsules of fresh-water pulmonate gastropods: Hygrophila, Basommatophora, Pulmonata. Naturhistorisk Museum.
Chicago-viite (17. p.)Bondesen, Poul. A Comparative Morphological-biological Analysis of the Egg Capsules of Fresh-water Pulmonate Gastropods: Hygrophila, Basommatophora, Pulmonata. Aarhus: Naturhistorisk Museum, 1950.
MLA-viite (8. p.)Bondesen, Poul. A Comparative Morphological-biological Analysis of the Egg Capsules of Fresh-water Pulmonate Gastropods: Hygrophila, Basommatophora, Pulmonata. Naturhistorisk Museum, 1950.
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