USMARC concise formats / 
prepered by Network Development and MARC Standards Office. 
 - Washington :  Library of Congress.Cataloging Distribution Service,  1991. 
 - 1v. (various paging) ;  28 cm. 
<br/><br/><label>ISBN: </label>0844406155 (looseleaf) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MARC formats--United States.<br/>Machine-readable bibliographic data--Standards--United States.<br/>Authority files (Cataloging)--Data processing--Standards--United States.<br/>Holdings (Bibliographic data)--Standards--United States.
<br/><br/><label>LC Class. No.: </label>Z699.4.M2  / U85 1991