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The handbook of environmental voluntary agreements : design, implementation and evaluation issues
Croci, Edoardo, (2005)
Umweltschutz der achtziger Jahre : eine Standortbestimmung ökologischer und ökonomischer Anforderungen
Ammer, Ulrich, (1981)
Urban environmental planning : policies, instruments and methods in an international perspective
Miller, Donald, (2005)
Water for human needs : Second World Congress of the International Water Resources Association, New Delhi, 12-16 December 1975
Hey, Richard D., (1976)