摘要：This article reports the results of a study on the usefulness of four online e-journal directories and two online union catalogs in accessing electronic journals. The coverage, accuracy, currency, and overlap among the six sources are compared. Multiple uniform resource locators (URLs) were found for most of the e-journals. Directories were found to include fewer URLs per title than the union catalogs, with a higher percentage of current, functioning URLs; the catalogs offered the highest number of working, current URLs. The findings point to different functions served by directories and catalogs, and highlight the difficulties involved in maintaining these reference sources in the Internet environment. Strategies for improving the accuracy and currency of the catalogs and directories are suggested.
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