無<br>Selectivity in the acquisition of primary journals is becoming increasingly important in view of the proliferation of journals and the pressure on acquisition budgets in Iibraries. Earlier studies have shown that in a given scientific subject, a relatively few primary journals contain a substantial proportion of journal literature, and the rest of the literature is scattered throughout a large number of journals only peripherally related to the subject. This project attempted to identify the core journals in Computer Science. Problems were discussed and characteristics of core journal collection were analyzed. The factors to be considered in any level of journal collection analysis include relation to curriculum and research; relation to the total collection; reputation of publishers and contributors; breadth and quantity of demand; cost; indexing in standard sources; accessibility from other sources. These and other bibliometric measures of journal significance such as impact factor are described and their relative advantages and weaknesses discussed
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