Spoel, S. van der. (1967). Euthecosomata, a group with remarkable developmental stages (Gastropoda, Pteropoda). Gorinchem: Noorduijn en Zoon. 378 pp. [20 November 1967].
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Spoel, S. van der
1967
<i>Euthecosomata, a group with remarkable developmental stages (Gastropoda, Pteropoda)</i>. Gorinchem: Noorduijn en Zoon. 378 pp. [20 November 1967]