Thirkettle, G L. <br/><br/>
Wheldon's Business statistics and statistical method/ 
 Business statistics and statistical method   
G L Thirkettle. 
 - 9th ed. (ELBS ed.) 
 - London :  Pitman,  1981 
 - ix, 278 p. :  ill. :  21cm. 
<br/><br/><label>ISBN: </label>0273026968 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Commercial statistics