Schockaert, E.R.; Ball, I.R. (Ed.) (1981). The Biology of the Turbellaria: Proceedings of the 3rd International Symposium held in Diepenbeek, Belgium, 11-15 August 1980. Developments in Hydrobiology, 6. W. Junk Publishers: The Hague/Boston/London. ISBN 978-94-009-8670-1; e-ISBN 978-94-009-8668-8. XIV, 302 pp. https://dx.doi.org/10.1007/978-94-009-8668-8, meer
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