Piaget, Jean,  1896-1980 <br/><br/>
The child's conception of physical casuality / 
Jean Piaget. 
 - London :  K. Paul,  1930. 
 - viii, 309 p. :  ill. ;  23 cm. 
<br/><br/> Translated by Marjorie Gabain".  Half-title: International library of psychology, philosophy and scie ntific method. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Child study.
<br/><br/><label>Dewey Class. No.: </label>155.4