Readings in educational psychology 
/ ed. by Victor H. Noll, ... Rachel P. Noll, ... 
. - 2nd ed. 
. - New York  : The MacMillan, c1968
. - XII-432 p.  : couv. ill.  ; 24 cm. 
<br/><br/><label>Source: </label> Don 
<br/><br/><label>Universal Decimal Class. No.: </label>159.9