Sigel, Irving E., <br/><br/>
Logical thinking in children; research based on Piaget's theory. 
Edited by Irving E. Sigel [and] Frank H. Hooper. With foreword by Bärbel Inhelder. 
 - New York  Holt, Rinehart and Winston  [1968] 
 - xv, 541 p.  illus.  24 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>LCCN: </label>68014732 //r88 
<br/><br/><label>Subjects--Personal Names: </label><br/>Piaget, Jean, 1896-1980. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Conservation of substance (Psychology)<br/>Child psychology
<br/><br/><label>LC Class. No.: </label>BF723.C68  / S5 
<br/><br/><label>Dewey Class. No.: </label>155.41/3