Research guide 

 - Netherlands:   Netherlands Institute for Documentation and Filing,   1963 
 - 199p.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research
<br/><br/><label>Subjects--Index Terms: </label>Document 
<br/><br/><label>Universal Decimal Class. No.: </label>5/6:061.6(492)(026)  / K3