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Gratch, B.; Settel, B.; Atherton, P.: Characteristics of book indexes for subject retrieval in the humanities and social sciences (1978)
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- Indexer. 11(1978), S.14-22
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Garfield, E.: ¬The Permuterm Subject Index : an autobiographic review (1976)
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Keen, E.M.: On the generation and searching of entries in printed subject indexes (1977)
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Craven, T.C.: NEPHIS: a nested phrase indexing system (1977)
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