Avram, H. (1968). The MARC pilot proyect. Library of Congress.
Chicago-čujuhus (17. p.)Avram, Henriette. The MARC Pilot Proyect. Washington: Library of Congress, 1968.
MLA-čujuhus (9. p.)Avram, Henriette. The MARC Pilot Proyect. Library of Congress, 1968.
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