The ISI Web of Knowledge have released the 2011 edition of the Journal Citation Reports. These contain data on the impact factors of more than 1600 journals.

 To access the JCR, you’ll need a RAVEN login off campus, or an NHS ATHENS login.

Go to http://wok.mimas.ac.uk, login, and click to access Journal Citation Reports.

Contact the medical library if you need any help getting the impact factors that are important to you.