Welcome to the Web of Causation ...and more by Malcolm.
Here you will find links to Epidemiology-related sites.
In addition, check out the links to the Government of
Canada.
Be sure to take a look at Dr. Driebe's
A Mildly Amusing Guide for the Weary Student and Anyone Else Encountering the How To's and What If's of Construct Validity.
Don't miss Dr. Trochim's online textbook for an introductory course in
research methods.