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          Egghe, Leo Informetrics 87/88 : Select Proceeding of the Firth International Conference on Bibliometricsand Theoretical Aspects of Information Petrieva Diepenbeek, Bergium, 25-28 August 1987 . / ed . by Leo Egghe and Ronald Rousseau . -- Amsterdan : Elsevier Science Publishers, 1988 . 11 microfichas diagrs . , tab .