Walker Helen M <br/><br/>
Elementary statistical methods. Ed 2. 

 - Ed. 3 
 -  1969 
 - xvi, 432p.  cm. 
 - International series in decision processes Ed by Ingram Olkin .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>B28, H3;K9