Warshawsky, Diane <br/><br/>
Spectrum I : a communicative cours in english / 
Diane Warshawsky with Donald R. H. Byrd. 
 - México :  Regents Publishing Co.,  1982 
 - viii, 135 p. 
<br/><br/><label>ISBN: </label>0-8345-501-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ingles--Libros de texto para extranjeros--Ingles
<br/><br/><label>LC Class. No.: </label>PE1130  / W3 1982