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International agreements to protect the environment and wildlife : report to the Committee on Finance, United States Senate, on Investigation No. 332- 287 under section 332 of the Tariff Act of 1930
(1991)
Enforcing pollution control laws
Russell, Clifford S., (1986)
Private versus öffentliche Überwachung und Durchsetzung umweltpolitischer Instrumente
Fischer, Anke, (1993)