TY  - BOOK
ED  - U. S. Library of Congress. Information systems office
TI  - Marc Manuals Used by the Library of Congress
PY  - 1969///
CY  - Chicago : 
PB  - American Library Association. Information science and automa, 
KW  - INFORMACION, TEORIA DE LA
N1  - 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
ER  -