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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, 1981 Availability: Items available for reference: Bib. Gregorio Torres Quintero: Disponible (Préstamo en sala) (1)Collection, call number: UNESCO 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 comparada Material type: Text; Format: print ; Literary form: Not fiction Publication details: Suiza : UNESCO, 1988 Availability: Items available for loan: Bib. Gregorio Torres Quintero (2)Collection, call number: Colección General 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 education Material type: Text; Literary form: Not fiction Publication details: Paris : UNESCO, 1987 Availability: Items available for reference: Bib. Gregorio Torres Quintero: Disponible (Préstamo en sala) (1)Collection, call number: UNESCO 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 education Material type: Text; Literary form: Not fiction Publication details: Paris : UNESCO, 1987 Availability: Items available for reference: Bib. Gregorio Torres Quintero: Disponible (Préstamo en sala) (1)Collection, call number: UNESCO 372.8 =40 ORP.