A Handbook for the Improvement of Textbooks and Teaching Materials as Aids to International Understanding /  Textual Documents 
UNESCO. 
 - 1st ed. / 
 - Paris :  UNESCO ,  1949. 
 - 172p. :  ill. ;  22cm . 
<br/><br/><label>Subjects--Index Terms: </label>Education Handbook-Teaching Materials as Aids G-Education 
<br/><br/><label>Dewey Class. No.: </label>371.32  / Un 2 H