![Robert G. Wetzel (Editor): <b>Periphyton of Freshwater Ecosystems.</b> Proceedings of the First International Workshop on Periphyton of Freshwater Ecosystems held in Växjö, Sweden, 14–17 September 1982. = Developments in Hydrobiology 17 (ed. H. J. Dumont).–346 pp. The Hague/Boston/Lancaster: Dr. W. Junk Publishers 1983. ISBN 90-6193-768-X. Hfl 235.00/US $ 87.50]()
Robert G. Wetzel (Editor): <b>Periphyton of Freshwater Ecosystems.</b> Proceedings of the First International Workshop on Periphyton of Freshwater Ecosystems held in Växjö, Sweden, 14–17 September 1982. = Developments in Hydrobiology 17 (ed. H. J. Dumont).–346 pp. The Hague/Boston/Lancaster: Dr. W. Junk Publishers 1983. ISBN 90-6193-768-X. Hfl 235.00/US $ 87.50H. Caspers · 1985