Journal Citation Reports has recently added 2009 content to the database which contains articles published in, articles cited from, and impact factor calculations from Web of Science-selected journals from 2007 and 2008. Data for previous years are available back to 2004.
Journal Citation Reports is a great resource for evaluating journals and finding the top journals in subject categories, which makes it a valuable research tool. It is available in 2 editions: Social Sciences and Science. The Science Edition contains data from over 7,300 journals in science and technology, while the Social Sciences Edition contains data from over 2,200 journals in the social sciences.