Information on the MARC System / 
MARC Development Ofice. 
 - 3rd edt. 
 - Washington :  Library of Congress,  1973. 
 - 44 p. 
<br/><br/>Bibliogr.: p. 37 - 44. 
<br/><br/><label>ISBN: </label>0-8444-0044-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MARC System