Snedecor, George Waddel. <br/><br/>
Statistical methods applied to experiments in agriculture and biology / 
by George W. Snedecor ; with chapter 17 on sampling by William G. Cochran. 
 - 5th ed. 
 - Ames :  Iowa State College Press,  1956. 
 - 534 p. :  ill. ;  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics.<br/>Agriculture--Statistics.<br/>Biology--Statistics.