Ballard, Philip Boswood. <br/><br/>
Mental tests / 
Philip Boswood Ballard. 
 - 2nd ed. 
 - london :  University of London press,  1937. 
 - 235 p. ;  18 cm. 
<br/><br/> Includes index. 
<br/><br/>326  326 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychology.
<br/><br/><label>Dewey Class. No.: </label>151.22 / B212m