Thirkettle, G. L. <br/><br/>
Wheldon's business statistics and statistical method 
G. L. Thirkettle 
 - 7th ed 
 - London :  Macdonald & Evans,  1972b 
 - 242p. :  ill. ;  23 cm 
<br/><br/> Previous ed.(B62-17186) 1962 
<br/><br/><label>ISBN: </label>0712102310 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics