Van Der Eyken, William. <br/><br/>
The pre-school years /  
W. Van Der Eyken. 
 - Revised ed. 
 - Harmondsworth :    Penguin,    1969. 
 - 192 p. :    ill. ;    19 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Infant psychology.
<br/><br/><label>Dewey Class. No.: </label>372.210942