Piaget, Jean,  1896- <br/><br/>
Main trends in inter-disciplinary research / 
by Jean Piaget. 
 - London :  Allen & Unwin,  1973. 
 - 73 p. :  ill. ;  22 cm. 
<br/><br/> 'Originally published as chapter 7 in Main trends of research in the social and human sciences, part 1, Mouton/Unesco, 1970.' 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>004301061X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research.