Cyclostome bryozoans: keys and notes for the identification of the species
Hayward, P.J.; Ryland, J.S. (1985). Cyclostome bryozoans: keys and notes for the identification of the species. Synopses of the British Fauna, N.S. 34. E.J. Brill/W. Backhuys: London. ISBN 90-04-07697-2. VI, 154 pp.
Deel van: Barnes, R.S.K.; Crothers, J.H. (Ed.) Synopses of the British Fauna. Linnean Society of London: London; New York. ISSN 0082-1101, meer
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