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Lancaster, F.W.; Mills, J.: Testing indexes and index language devices : the ASLIB Cranfield project (1964)
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Swanson, D.R.: ¬The evidence underlying the Cranfield results (1965)
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Richmond, P.A.: Review of the Cranfield project (1963)
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Cleverdon, C.W.: ¬The Cranfield tests on index language devices (1967)
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