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Biologische Untersuchungen TAF. III . GUSTAF PiETZIUS ber den Bau des Eies der Echinodermen etc bioi mit xv Taf III ' SV ' '' ' ' Sfe t'j tat Repr und Druck von Cederquists Graf Sthlr TAF III Illustration XV biodiversitylibrary org title Frst Carl Magnus Retzius Gustaf Stach Wilhelm Biodiversity Heritage