congrès/colloque

Lake and stream indicators for U.S. EPA's environmental monitoring and assessment program

R. Hughes ; CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY USA ; Proceedings : International Symposium on Ecological Indicators, Oct 1990 in Ft Lauderdale, FL., USA (1990; USA) | Corvallis, Or., USA : US Environmental Protection Agency | PB91-191080 | 1991

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