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  1. Garcia-Suarez, V.M.: ¬El servicio de referencia y el referencista contemporaneos : retos y oportunidades (1995) 0.02 
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  2. Matus, G.S.; Mendoza, E.S.; Duran, C.V.C.: Estudio comparativo de los usuarios reales y potenciales de bases de datos cientificas : una experiencia y una reflexion en la Universidad de Concepcion (1994) 0.02 
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