Cochran William G. <br/><br/>
Planning and analysis of observational studies 
by Cochran William G. 
 - New York   John Wiley an sons     1983 
 - xiii,145p.  cm. 
 - Wiley series in probability and mathematical statistics .
<br/><br/><label>Standard No.: </label>67133 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Experimental design
<br/><br/><label>Dewey Class. No.: </label>B2817, M3