Snedecor, George Waddel, 1881- <br/><br/>
Statistical methods 

 - 6th ed 
 - Ames, Iowa  Iowa State University  1967 
 - xiv, 593p. : ill 
<br/><br/><label>ISBN: </label>0813815606 
<br/><br/><label>LC Class. No.: </label>HA 29 Sne