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Milstead, J.L.: Methodologies for subject analysis in bibliographic databases (1992)
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Jose, M.: Bibliographic databases in information storage and retrieval (1992)
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Hjoerland, B.: Classical databases and knowledge organisation : a case for Boolean retrieval and human decision-making during search (2014)
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Williamson, N.J.: Standards and rules for subject access (1996)
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Hirawa, M.: Role of keywords in the network searching era (1998)
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