Snedecor, George W. <br/><br/>
Statistical methods  / 

 - 7th 
 - Ames:  Iowa State University Press,  1980 
 - xvi, 507p. Index, Appendix. 
<br/><br/><label>ISBN: </label>0813815606 
<br/><br/><label>Dewey Class. No.: </label>519.50182  / Sn671.SM