Proceedings of second seminar on UDC and mechanized information systems conducted by Robert R. Freeman, Frankfurt, 1st-5th June 1970 

 - (Denmarks Tekniske Bibliotek) : Copenhagen :  Dansk Central for Dokumentation,  1971 
 - 234 p. :  ill. ;  30 cm. 
 - FID publication  405 .
<br/><br/> English, French, or German. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Classification, Universal decimal--Congresses.<br/>Information storage and retrieval systems--Congresses.<br/>Automatic classification--Congresses.