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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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Only one earth : the care and maintenance of a small planet
Ward, Barbara; Dubos, René J. - 1972 - 1. ed.
Persistent link: https://www.econbiz.de/10000607845
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Only one Earth : the long road via Rio to sustainable development
Dodds, Felix; Strauss, Michael; Strong, Maurice F. - 2012
Persistent link: https://www.econbiz.de/10009545546
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Themen für den Umweltgipfel 1992 : die globale Herausforderung
Strong, Maurice F. - In: Europa-Archiv / Beiträge und Berichte : Zeitschrift … 47 (1992) 9, pp. 231-237
Persistent link: https://www.econbiz.de/10001122273
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Required global changes : close linkages between environment and development
Strong, Maurice F. - 1992
Persistent link: https://www.econbiz.de/10001326916