Make a list of search words and phrases related to your search. You will edit and refine this list as you go through your search process and learn more.
Things to consider:
Google Advanced Search: https://www.google.com/advanced_search
Use domain limiter (.org, .edu, .gov) - but be careful. These sites could still be business or political sites masquerading as information sources.
Additional primary source search terms to try if needed:
Or, try these format specific search terms:
source: Robin M. Katz, How to Google for Primary Sources. (Click for additional search terms.)
To evaluate your sources, go as far as you can. Look for:
source: Robin M. Katz, Evaluating Primary Sources Online. (Click for more.)