Sadler, A. J. <br/><br/>
Understanding pure mathematics / 
A.J. Sadler, D.W.S. Thorning 
 - Oxford :  Oxford University Press,  1987 
 - v, 602 p. :  ill. ;  24 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0199142432 9780199142439 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Problems, exercises, etc.