The best(in general) source should be USNews, http://www.usnews.com/usnews/edu/home.htm, and NRC also has a good one for all majors. In Canada, http://www.macleans.ca/pub-doc/1999/11/15/Universities1999/index.shtml should be the most recognized one.
Hi, there. Orginal Beijingness, Current Vancouver resident. Feel free to contact me if you think I may be helpful.