Solórzano Helen S.  <br/><br/>
North Star : teacher's manual  : focus on listening and speaking : intermediate 
/ Helen S. Solórzano, Jennifer P. L. Schmidt  
 - White Plains :   Longman,   1999. 
 - XI, 46, [2] s. ;  26 cm  10AGR-SolH-Nor:N 
<br/><br/><label>ISBN: </label>0201357038