Spectrum 4 : a communicative course in English. (New York, New York : Regents, 1985)
Contenido: Teacher's edition / Nancy Frankfort, Joan Dye, Donald R.H. Byrd -- Student book / Diane Warshawsky with Donald R.H. Byrd-- Workbook / David P. Rein with Donald R.H. Byrd
Keywords: INGLES -- ESTUDIO Y ENSEÑANZA