Nemerteans: keys and notes for identification of the species
Gibson, R. (1994). Nemerteans: keys and notes for identification of the species. Revised edition. Synopses of the British Fauna, N.S. 24. Field Studies Council: Shrewsbury. ISBN 1-85153-253-6. VII, 224 pp.
Part of: Barnes, R.S.K.; Crothers, J.H. (Ed.) Synopses of the British Fauna. Linnean Society of London: London; New York. ISSN 0082-1101, more
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