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author_ss:"Cleverdon, C.W."
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language_ss:"e"
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year_i:[1980 TO 1990}
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theme_ss:"Retrievalstudien"
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Cleverdon, C.W.; Mills, J.: ¬The testing of index language devices (1985)
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1.0 = *:*, product of: 1.0 = boost 1.0 = queryNorm