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Herrick, M.D.: ¬The development of a classified catalog in library schools (1953)
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- College and research libraries. 14(1953) no.4, S.418-424
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Anker, J.: Some principles of a systematically arranged subject catalogue with an index (1956)
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- Libri. 7(1956-58) no.1, S.55-70
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Barnholdt, B.: ¬A computer-based system for production of a UDC-classed libray catalog at the Technological University Library of Denmark (1968)
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- Libri. 18(1968) no.3/4, S.191-196
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¬Der Alte Realkatalog der Staatsbibliothek ist online (2006)
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- BuB. 58(2006) H.1, S.16