Unesco <br/><br/>
Programmed instruction    An international directory.     

 -  1967 
<br/><br/><label>Standard No.: </label>54865 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Subjects--Topical Terms: </label><br/>EDUCATION
<br/><br/><label>Dewey Class. No.: </label>T:3y4n1.N6, K7(RR)