Ambler, Eric. <br/><br/>
The dark frontier / 
Eric Ambler, abridged and simplified by Richard Hail. 
 - London :  Collins ELT,  1982. 
 - 112 pages ;   illustrations ;   18 cm. 
<br/><br/><label>ISBN: </label>0003701441 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English Readers