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		No cover image available L' Acces des travailleurs a l'enseignement superieur: obstacles et difficultes / Ingvar Werdelin. by Werdelin, Ingvar. Material type: Text; Literary form: Not fiction Publication details: Paris : UNESCO, 1981Availability: Items available for reference: Disponible (Préstamo en sala) (1) . Collection(s): UNESCO Call number: 378 (100) =40 WER.
		Ciencia y tecnología en la enseñanza primaria del mañana / Graham Orpwood, Ingvar Werdelin. by Orpwood, Graham \| Werdelin, Ingvar [coaut.]. Series: Estudios y encuestas de educación comparadaMaterial type: Text; Format: print ; Literary form: Not fiction Publication details: Suiza : UNESCO, 1988Availability: Items available for loan: 2 . Collection(s): Colección General Call number: LB1555 O7.2. Place hold
		Science and technology in the primary school of tomorrow / Graham Orpwood; Ingvar Werdelin. by Orpwood, Graham \| Werdelin, Ingvar \| OIE. Oficina Internacional de Educación. Series: (Studies and surreys in comparative educationMaterial type: Text; Literary form: Not fiction Publication details: Paris : UNESCO, 1987Availability: Items available for reference: Disponible (Préstamo en sala) (1) . Collection(s): UNESCO Call number: 372.8 =20 ORP.
		Science et technique dans l´enseignement primaire de demain / Graham Orpwood; Ingvar Werdelin. Graham Orpwood; Ingvar Werdelin. by Orpwood, Graham \| Werdelin, Ingvar \| OIE. Oficina Internacional de Educación. Series: (Studies and surreys in comparative educationMaterial type: Text; Literary form: Not fiction Publication details: Paris : UNESCO, 1987Availability: Items available for reference: Disponible (Préstamo en sala) (1) . Collection(s): UNESCO Call number: 372.8 =40 ORP.