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Perspectives on environment
Manners, Ian R., (1974)
Public policy, technology and the environment : a comparative inquiry into agricultural policy approaches and environmental outcomes in the United States and Switzerland
Bloomfield, Irirangi Coates, (1981)
3. [Dritte] Welt : 11 Grundfragen zu Landwirtschaft, Ernährung, Gesundheit u. Umwelt
Aubert, Claude, (1986)