Cox, Christopher J. <br/><br/>
Understanding mathematics 4 :  certificate course / 
C.J. Cox and D. Bell. 
 - London :  John Murray,  1987. 
 - [248]p. :  ill. ;  25cm. 
<br/><br/><label>ISBN: </label>0719543029 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>LC Class. No.: </label>QA39.2