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Vandewalle, K.: SISO of trefwoorden voor de jeugd? (1995)
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NBLC trefwoorden thesaurus : handleiding (1996)
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Verweij, W.C.: Trefwoorden bij de UB Amsterdam (1982)
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Voorbij, H.: Titelwoorden - trefwoorden : een vergelijkend onderzoek (1997)
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Plaister, J.: PICA : Centrum voor Bibliotheekautomatisering (1987)
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