Philippson L.M. (1788). Dissertation historico-naturalis sistens nova testaceorum genera. Quam venia ampliss. facult. philosophicae preside D. M. Andr. J. Retzio.... Lund pp. 23. [Opinion 495/1957 of ICZN states Philippson as the author of this work usually credited to Retzius]:
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Philippson, L. M.
1788
Dissertation historico-naturalis sistens nova testaceorum genera. Quam venia ampliss
facult. philosophicae preside D. M. Andr. J. Retzio