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1by Meeting of the Chief Editors of the State-of-the-Art Report Entitled Processes Affecting Pollution of Fresh Surface Waters, 2nd, Paris, 1978, Working Group on the Dispersion of Pollutants and Self-purification processes in Rivers, Lakes, Reservoirs and Estuariesprogramme and meeting document bibliotecaUNESCO
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2by Meeting of the Chief Editors of the State-of-the-Art Report Entitled Processes Affecting Pollution of Fresh Surface Waters, 2nd, Paris, 1978, Working Group on the Dispersion of Pollutants and Self-purification processes in Rivers, Lakes, Reservoirs and Estuariesprogramme and meeting document bibliotecaUNESCO
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3by Meeting of the Chief Editors of the State-of-the-Art Report Entitled Processes Affecting Pollution of Fresh Surface Waters, 2nd, Paris, 1978, Working Group on the Dispersion of Pollutants and Self-purification processes in Rivers, Lakes, Reservoirs and Estuariesprogramme and meeting document bibliotecaUNESCO
