Snedecor, George W.    <br/><br/>
Statistical methods: applied to experiments in agriculture and biology                               
Snedecor, George W.                  
 - 5th ed. 
 - Ames, Iowa  The Iowa State University Press  1962 
 - xiii, 534 p. 
<br/><br/> With chapter 17 on sampling by William G. Cochran 
<br/><br/><label>Dewey Class. No.: </label>311.2