Spectrum 6 : a comunicative course in English - Costinett, Sandra; Byrd, Donald R. H. (Upper Saddle River, N.J. : Prentice Hall Regents, 1994)
Contenido: Student book / Sandra Costinett with Donald R.H. Byrd Workbook / David P. Rein with Donald R.H. Byrd
Keywords: INGLES; ESTUDIO Y ENSEÑANZA; TEXTOS PARA EXTRANJEROS