The linked PDF handout above shows the differences between primary and secondary sources with tips for finding primary sources in the Ort Library.
The University of Saskatchewan also describes primary, secondary, and tertiary sources at How to Evaluate Information Sources.
Click here for valuable criteria to use when evaluating Web resources.
Additionally, the CARS checklist in the handout below can help you evaluate print or Web information for Credibility, Accuracy, Reasonableness, and Support:
For the most focused and powerful Web search results, try Google Advanced!
You may want to use web resources for your historical research and there are many good sites that are reliable that you can use, even for primary sources.
Try some of the tips and tools at the site Using Primary Sources on the Web provided by the American Library Association's Reference and User Services Association. It's a good place to start!.