Handbook on the international exchange of publications 
/ UNSECO 
 - Paris:   UNESCO,   1950 
 - 369p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library science 
<br/><br/><label>Subjects--Index Terms: </label>Exchange  Exchange service  
<br/><br/><label>Universal Decimal Class. No.: </label>D 021.852   / J0;1