Marc Manuals Used by the Library of Congress 

 - Chicago :   American Library Association. Information science and automa,   1969. 
 - paginación varia, 1 v. :   il., tablas ;   28 cm. 
<br/><br/> Contenido.- t. Subscriber's guide to the Marc distribution service.- 2. Data preparation manual: Marc editors.- 3. Transcription manual.- 4. Computer and magnetic tape unit usability study. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>INFORMACION, TEORIA DE LA