Christophersen, Paul. <br/><br/>
An Advanced English Grammar / 
P. Christophersen & A.O. Sandved. 
 - London :  The Macmillan Press Ltd,  1980. 
 - 278 p. 
<br/><br/>Includes Index. 
<br/><br/><label>ISBN: </label>0-333-10643-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English Grammar