Government websites are great sources of information for this project - but how do you sift through all the information on the internet to find them?! Try a Google Site Search!
Go to http://www.google.com. Type in your search term(s) followed by site:.gov like this:
You can also do this from Google's Advanced Search (http://www.google.com/advanced_search)
Articles from scholarly/peer-reviewed journals, magazines, and newspapers
Books on all subjects from a wide range of academic and general publishers