United Nations Educational, Scientific and <br/><br/>
Vacations abroad : courses, study tours, work  camps. Vol.17. 
<label>/ by </label> United Nations Educational, Scientific and 
<label>;</label> Cultural Organisation 
 - Paris  Unesco  1965 
 - 162p.  24 cm. 
<br/><br/>PR 
<br/><br/><label>Dewey Class. No.: </label>370  / U