MARC 21 format for authority data  including guidelines for content designation 
prepared by Network Development and MARC Standards Office, Library of Congress in cooperation with Standards and Support, Library and Archives Canada, Bibliographic Standards and Systems, British Library. 
 - 1999 ed. 
 - Washington  Ottawa  Library of Congress, Cataloging Distribution Service  Library and Archives Canada  1999- 
 - v. (loose-leaf)  28 cm. 
 - 
<br/><br/> Second publisher varies: National Library of Canada, 1999-2003.  Description based on: update no. 5 (Oct. 2004). 
<br/><br/>Includes bibliographical references . 
<br/><br/>
<br/><br/>Prepared in cooperation with Standards and Support, National Library of Canada, 1999-<update no. 2 (Oct. 2001)>; Standards and Support, National Library of Canada and the National Bibliographic Service, British Library, -update no. 4 (Oct. 2003). 
<br/><br/>Merger of: USMARC format for authority data. 1993 ed., and: Canadian MARC communication format. Authorities. 3rd ed. 
<br/><br/><label>ISBN: </label>0844409979 9780844409979 
<br/><br/><label>LCCN: </label>2008230185 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MARC formats<br/>Authority files Information retrieval--Data processing.
<br/><br/><label>LC Class. No.: </label>Z699.35.M28  / M375 1999 
<br/><br/><label>GPO Item No.: </label>0815 0815 (online) 0815-G-05 0815-G-05 (online) 
<br/><br/><label>Gov. Doc. Class. No.: </label>LC 30.25:AU 8/999 LC 30.25/6: