Allen, W. Stannard <br/><br/>
Living English structure  : key to the exercises 
/ W. Stannard Allen 
. - London  : Longman, 1990
. - 26 p.  ; 20 cm. 
 - Longman .
<br/><br/><label>ISBN: </label>9780582552043 0582552044 
<br/><br/><label>Source: </label> Don 
<br/><br/><label>Universal Decimal Class. No.: </label>802.0