MARC manuals used by the library of congress:   Prepared by the information systems office, Library of Congress 
/ ALA 
 - Chicago:   ALA,   1969 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library science
<br/><br/><label>Universal Decimal Class. No.: </label>D 025.3(026)   / K9