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          Egghe, Leo    Informatrics 89/90 : Selection of papers subnited for the second International Conference on Bibliometrics, Scientometrics and Informetrics, London, Ontqrio, Cadana ; 5-7 July 1989 . / ed by Leo Egghe and Roland Rousseau .- Amsterdam : Elsevier Science Publishers, 1990 . 6 microfichas diagrs . , tab . Incluye indice (Continua ficha 2 )