Griffiths, Ruth.  <br/><br/>
The abilities of babies :  a study in mental measurement / 
Ruth Griffiths.  
 - London :  University of London,   c 1954. 
 - x, 234 p. :  ill. ;  23 cm. 
<br/><br/> Includes Index. 
<br/><br/>Includes Bibliography : p. 219-226. 
<br/><br/>313  313 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Child psychology.
<br/><br/><label>Dewey Class. No.: </label>151.2 / G875a