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1311
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1317
Socio-economic and communication indicators in development planning a case study of Iran.
Gepubliceerd in 1980Boek -
1318
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1319
Biology education in Asia report of a regional workshop, Quezon City, Philippines, 18-23 August 1980.
Gepubliceerd in 1980Boek -
1320
Strategies for the training of teachers in environmental education a discussion guide for UNESCO
Gepubliceerd in 1980Boek


