Macrobenthos of the North Sea - Mollusca: Familia Ungulinidae

Familia Ungulinidae

Poppe, G.T. & Y. Goto 1993. European Seashells. Vol. II. 221 pp. Wiesbaden/Verlag Christa Hemmen.
Step, E. 1927. Shell life. 421 pp. Frederick Warne & Co., LTD, London.

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