MARC manuals used by the Library of Congress. 

 - 2nd ed. 
 - Chicago :  Information Science and Automation Division, American Library Association,  1970. 
<br/><br/>v. 1. Books : a MARC format. 4th ed. 1970 -- v. 2. Data preparation manual : MARC editors. 3d ed. 1970 -- v. 3. Transcription manual : MARC typists -- v. 4. Computer and magnetic tape unit usability study. 
<br/><br/><label>ISBN: </label>0838931189 
<br/><br/><label>LCCN: </label>78131301 //r942 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MARC formats -- United States -- Handbooks, manuals, etc.--MARC formats -- United States -- Handbooks, manuals, etc.--MARC formats -- United States -- Handbooks, manuals, etc.
<br/><br/><label>LC Class. No.: </label>Z699  / .U522 1970 
<br/><br/><label>Dewey Class. No.: </label>029.7