Nemertea
Gibson, R. (1982). Nemertea, in: Parker, S.P. (Ed.) Synopsis and classification of living organisms, Volume 1. pp. 823-846
In: Parker, S.P. (Ed.) (1982). Synopsis and classification of living organisms, Volume 1. MacGraw-Hill: New York. ISBN 0-07-079031-0. XVIII, 1166 pp., more
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