Langford, Peter. <br/><br/>
Concept Development in the Secondary School: 
Langford, Peter. 
 - New York:  Croom Helm in association with Methuen, Inc.  1987. 
 - 172p.: 
<br/><br/><label>ISBN: </label>0709941633 
<br/><br/><label>Subjects--Topical Terms: </label> Concept Development in the Secondary School. 
<br/><br/><label>Dewey Class. No.: </label>370.152