Kelley, Truman L. <br/><br/>
Essential Traits of Mental Life : the purposes &  principles  underlying  the section & measurement of independent mental factors ,together with computational tables 

 - 1935. 
 - Cambridge:  Harvard University Press,  1935. 
 - 145p. 
<br/><br/><label>Dewey Class. No.: </label>370.7 KEL