Kohnstamm, Geldolph A. ,  1908- <br/><br/>
Piaget's analysis of class inclusion :  right or wrong / 
by Geldolph A. Kohnstamm 
 - The Hague :  Mouton,  1968 
 - 153 p. :  ill., photo. ;  23 cm. 
 - Psychological studies minor series ;  no. 1 .
<br/><br/><label>ISBN: </label> DG 24 (pbk) 
<br/><br/><label>Subjects--Personal Names: </label><br/>Piaget, Jean, 1896- 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Number concept<br/>Whole and parts (Psychology)<br/>Child psychology
<br/><br/><label>Dewey Class. No.: </label>136.7