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Baltzer, F., 1934. Echiurida. In: Handbuch der Zoologie, zweiter Band. Walter de Gruyter & Co., Berlin und Leipzig.

Knight-Jones, E.W. & J.S. Ryland, 1990. Priapulida, Sipuncula, Echiura, Pogonophora, and Entoprocta. In: The Marine Fauna of the British Isles and North-West Europe. (ed. P.J. Hayward & J.S. Ryland). Clarendon Press, Oxford.

Echiurus echiurus