Friend, D.V. <br/><br/>
Quantitative methods / 
D.V. Friend. 
 - London  :  Longman,  1987. 
 - 248 p. :  ill. ;  25 cm. 
 - Longman exam guides. .
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>058229696X (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Problems, exercises, etc.
<br/><br/><label>Subjects--Index Terms: </label>Mathematics - For business studies