Grolier, Eric de <br/><br/>
Study of general categories applicable to classification and coding in documentation   

 - Paris:  UNESCO,   1962 
 - 248p.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library science 
<br/><br/><label>Subjects--Index Terms: </label>Classification  Documentation center  
<br/><br/><label>Universal Decimal Class. No.: </label>D 025.4  / K22