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		No cover image available Ecología y educación ambiental : paquete didáctico Material type: Text; Format: print ; Literary form: Not fiction Publication details: México : SEDUE$bSEP, 1989 Availability: Not available: Bib. Gregorio Torres Quintero: Coleccion SEP (2).
		No cover image available La República Mexicana : equilibrio ecológico Material type: Text; Format: print ; Literary form: Not fiction Publication details: México : SEDUE$bSEP, 1992 Availability: Items available for reference: Bib. Gregorio Torres Quintero: Disponible (Préstamo en sala) (6)Collection, call number: Libros de texto gratuitos LB1585 M6 1992, ...

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