THIRKETTLE,G.L <br/><br/>
Weldon's Business Statistics & Statustucal Method 

 - 9th ed. 
 - London  ELBS/Pitman Pub,  1986 
 - ix, 278p. 
<br/><br/><label>ISBN: </label>273026968 
<br/><br/><label>Dewey Class. No.: </label>650