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Filters: Keyword is environmental education and Author is Saywell, D.L.  [Clear All Filters]
1994
K. K. Mohan y Saywell, D. L., «Effective environmental education : constraints and prerequisites», Waterlines, an international journal of water, sanitation and waste, pp. p. 19-21: 1 ill., 2 photogr., 1994.
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