Unesco <br/><br/>
Its International directories of education series,4 

 -  1966 
<br/><br/><label>Standard No.: </label>48540 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Subjects--Topical Terms: </label><br/>EDUCATION
<br/><br/><label>Dewey Class. No.: </label>T3h1,N5a, K6(RR)