Heard, T. J. <br/><br/>
Extending Mathematics  a secondary course in pure mathematics beyond 'O' level 

 - London  Oxford University Press  1974 
 - 461 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>510  / HEA