The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.


  • Spic. Zool., 10, 28.
  • Spoel, Siebrecht van der, and José R. Dadon / Boltovskoy, Demetrio, ed. 1999. Pteropoda. South Antlantic Zooplankton, vol. 1. 649-706
  • Spoel, Siebrecht van der. 1976. Pseudothecosomata, Gymnosomata and Heteropoda (Gastropoda). 484
  • Spoel, V D. S. (1976). Pseudothecosomata, gymnosomata and heteropoda (gastropoda). 484. Amsterdam: Bohn, Scheltema & Holkeme Utrecht.


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