Echinoderma (part II) and Enteropneusta : larvae of Echinoderma and Enteropneusta - MacBride, E. W. (Ernest William),; British Antarctic ("Terra Nova") Expedition ([S.l, s.n.], 1920, 1920)
https://www.biodiversitylibrary.org/bibliography/12020
Keywords: Echinodermata|Enteropneusta|