Clarke, Leonard Harwood. <br/><br/>
Ordinary Level mathematics / 
L. Harwood Clarke. 
 - 7th ed. /  F.G.J. Norton. 
 - London :  Heinemann Educational,  1984. 
 - xvi, 503 p. :  ill. ;  24 cm. 
<br/><br/> With answers.  Previous ed.: 1978.  Includes index. 
<br/><br/><label>ISBN: </label>0435502220  
<br/><br/><label>Source: </label>B-4722 
<br/><br/><label>LCCN: </label>gb 85008976 
<br/><br/><label>Nat. Bib. No.: </label>GB85-8976 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics.
<br/><br/><label>LC Class. No.: </label>QA39.2.C5