Blackwell, David. <br/><br/>
Basic Statistics /  

 - 1st ed /  
 - New York :   McGraw-Hill Book Company ,   1949 
 - p.143 :  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics
<br/><br/><label>Dewey Class. No.: </label>B28  / K9B