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by National Research Council of Canada Associate Committee on Scientific Criteria for Environmental Quality.;
Year: 1986., Callno: 632.954 PYR [Q]
Book
by Wulff, F. (ed.); Field, J. G. (ed.).; Mann, K. H. (ed.);
Year: 1989.
Book
by Sheppard, Charles R. C.;
Year: 1983.
Book
by Qingchao, Chen;
Year: 1992.
Book
by O'Connor, Ruth; Kotlash, Amanda; Co-operative Research Centre for Freshwater Ecology (Australia).;
Year: 2005
Book
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by Pusey, B. J.; Storey, A. W.; Davies, P. M.; Edward, D. H. D.;
Year: 1989
Journal Article
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