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Wilson, T.D.: ¬An introduction to chain indexing (1971)
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Rennau, G.: Register von Karten und Atlanten (1976)
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Wheatley, A.: ¬A manual on printed subject indexes : report to the British Library Research and Development Department on Project SI/G/243 (1978)
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Indexers on indexing : a selection of articles published in "The Indexer" (1978)
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