Online resources can be useful for contributing to your research. Especially when researching older information that might be in the public domain. You'll be surprised what you can find digitized and freely available online! The thing to remember about online resources is that you are responsible for verifying the credibility of the source. Ask yourself a few questions like:
If you need help evaluating a web source, ask a librarian for assistance.
Below is a list of websites to get you started. Keep in mind it is not a definitive list, so use your Google search tips to find additional credible websites.