A Google Search is fine for this project--but to ensure that you are finding credible sources--try to look for sources that are from:
.EDU
.ORG
.GOV
Some .COMS are okay--for example, something from a reputable magazine like American Heritage or an online encyclopedic resource should be okay.
DON'T FORGET PICTURES AND MAPS FROM INTERNET SOURCES REQUIRE CITATIONS!
If you aren't certain, always ask your professor if the source you are hoping to use will be acceptable.
