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		English for us : text and exercises / Bernardo Vallejo, Margaret Albers by Vallejo, Bernardo Albers, Margaret [coaut.] Material type: Text; Format: print ; Literary form: Not fiction Publication details: México : Trillas, 1993 Availability: Items available for reference: Bib. Gregorio Torres Quintero: Disponible (Préstamo en sala) (1)Collection, call number: Libros de texto LB1631 M6 V3.4.
		English for us tree : text and exercises / Bernardo Vallejo by Vallejo, Bernardo Material type: Text; Format: print ; Literary form: Not fiction Publication details: México : Trillas, 1994 Availability: Items available for reference: Bib. Gregorio Torres Quintero: Disponible (Préstamo en sala) (2)Collection, call number: Libros de texto LB1631 M6.3 V3.4 LE, ...
		No cover image available Learning english / Bernando Vallejo by Vallejo, Bernardo Material type: Text; Format: print ; Literary form: Not fiction Publication details: México : Trillas, 1976 Availability: Items available for reference: Bib. Gregorio Torres Quintero: Disponible (Préstamo en sala) (1)Collection, call number: Libros de texto LB1631 M6.1 V3.4 1976.
		No cover image available Learning english / Bernardo Vallejo, María Teresa Taboada. by Vallejo, Bernardo Taboada, María Teresa [coaut.] Edition: 2a ed. Material type: Text; Format: print ; Literary form: Not fiction Publication details: México : Trillas, 1977 Availability: Items available for reference: Bib. Gregorio Torres Quintero: Disponible (Préstamo en sala) (1)Collection, call number: Libros de texto LB1631 M6.2 V3.4 1977.