Ruch, Floyd Leon. <br/><br/>
Psychology and life / 
Floyd L. Ruch. 
 - 7th ed. 
 - [Glenview, Ill.] :  Scott, Foresman,  1967. 
 - 758 p. :  ill. (part col.) 
<br/><br/> "Reference manual: Basic concepts in statistics [by] William W. Ruch. Frontiers in psychology [by] Robert Rosenthal [and others]" p. [615] 
<br/><br/>Bibliography: p. [687]-719. 
<br/><br/><label>LCCN: </label>67015475  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychology.