JCR: Journal Citation Reports -- A resources tool for journal evaluation and comparison of usage patterns for scholarly journals, using citation data drawn from titles worldwide. Among other data, JCR can provide a list of the most frequently cited titles, those with highest impact (i.e., the frequency with which the "average article" in a journal has been cited in a particular year), and those with the greatest immediacy (i.e., how quickly the average article in a journal is cited).
Coverage: