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Engeldinger, E.A.: "Use" as a criterion for the weeding of reference collections (1990)
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Bentley, S.; Kent, C.; LaGuardia, C.: Reference sources for the digital age (1995)
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Popp, M.P.; Kabir, A.F.M.F.: CD-ROM sources in the reference collection : issues of access and maintenance (1990)
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Vega, A.M.: ¬La coleccion de referencia (1997)
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Kronenfeld, M.: Theory and implementation of an automated vertical file (1994)
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