Downing, A. <br/><br/>
English grammar:  a university course/ 

 - 2nd 
 - London:  Routledge,  1992. 
 - xxi, 610 p.:  ill.;  24 cm. 
<br/><br/> includes bibliography and index. 
<br/><br/><label>ISBN: </label>9780415287876 
<br/><br/><label>LC Class. No.: </label>DUCE PE 1112.D68