Essential grammar in use :
Murphy, Raymond.
Essential grammar in use : a self-study reference and practice book for elementary students of english with answers / Raymond Murphy. - 3rd ed. - Cambridge : Cambridge University Press, 2007. - 319 p.
INGLES --GRAMATICA --PROBLEMAS, EJERCICIOS, ETC.
INGLES --TEXTO DE ESTUDIO.
421.5 M978e 2007
Essential grammar in use : a self-study reference and practice book for elementary students of english with answers / Raymond Murphy. - 3rd ed. - Cambridge : Cambridge University Press, 2007. - 319 p.
INGLES --GRAMATICA --PROBLEMAS, EJERCICIOS, ETC.
INGLES --TEXTO DE ESTUDIO.
421.5 M978e 2007