Hellawell, J. M. (1986). Biological indicators of freshwater pollution and environmental management. Elsevier Applied Science Publishers.
Chicago-стиль цитированияHellawell, J. M. Biological Indicators of Freshwater Pollution and Environmental Management. Elsevier Applied Science Publishers, 1986.
MLA-цитированиеHellawell, J. M. Biological Indicators of Freshwater Pollution and Environmental Management. Elsevier Applied Science Publishers, 1986.
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