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World directory of environmental education programs : post-secondary study and training in 70 countries
Quigg, Philip W. (contributor); Ward, Barbara (contributor) - 1973
Persistent link: https://www.econbiz.de/10003270886
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Environment : the major factor in tomorrowʹs business
Strong, Maurice F.; Ward, Barbara; Dubos, René - In: The Columbia journal of world business : publ. … 7 (1972) 3, pp. 5-40
Persistent link: https://www.econbiz.de/10002891031