Flatworms and ribbon worms (Phyla Platyhelmintes and Nemertea)
Gibson, R.J.; Knight-Jones, E.W. (1996). Flatworms and ribbon worms (Phyla Platyhelmintes and Nemertea), in: Hayward, P.J. et al. (1995). Handbook of the marine fauna of North-West Europe. pp. 136-164
In: Hayward, P.J.; Ryland, J.S. (Ed.) (1995). Handbook of the marine fauna of North-West Europe. First edition. Oxford University Press: Oxford. ISBN 0-19-854054-X. XI, 800 pp., more
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