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		No cover image available Enseñanza de las ciencias en la escuela primaria / Gerald Spellman Craig ; tr. Andrés Pirk. by Craig, Gerald Spellman, n. 1893. Series: Nueva pedagogía ; 12Material type: Text; Literary form: Not fiction Publication details: México : Centro Regional de Ayuda Técnica, AID, 1970Availability: Items available for reference: Disponible (Préstamo en sala) (1) . Collection(s): Folletería Call number: LB7 N8.68 no.12.
		No cover image available Our earth and sky / by Gerald S. Craig and Sara E. Baldwin. by Craig, Gerald Spellman, n. 1893 \| Baldwin, Sara [coaut.]. Material type: Text; Format: print ; Literary form: Not fiction Publication details: Boston, E.U.A. : Ginn, 1940Availability: Items available for reference: Disponible (Previa cita) (1) . Collection(s): Fondo Reservado de libros Call number: PE1117 C7.6.
		No cover image available We find out / Gerald S. Craig and Agnes Burke. by Craig, Gerald Spellman, n. 1893 \| Burke, Agnes [coaut.]. Series: New pathways in scienceMaterial type: Text; Format: print ; Literary form: Not fiction Publication details: Boston, E.U.A. : Ginn, 1940Availability: Items available for loan: 1 . Collection(s): Colección General Call number: PE1119 C7.8. Place hold

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