Théel, H. (1911). Priapulids and sipunculids dredged by the Swedish Antarctic Expedition 1901-1903 and the phenomenon of bipolarity. Kungliga Svenska Vetenskapsakademiens Handlingar. 47(1): 3-36, pls. 31-35.
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Théel, H.
1911
Priapulids and sipunculids dredged by the Swedish Antarctic Expedition 1901-1903 and the phenomenon of bipolarity