Online Resources
At Frost Library
Archives in Cambridge
For example
Common primary source keywords include:
You can also try keywords for kinds of primary sources:
Remember to evaluate the sites you find -- even a quick check to see if a site is produced by an archives, museum, governmental agency, or educational institution can help you determine whether this is a legitimate, trustworthy source for information. The best sites for primary sources will provide you with the information you need to cite your sources.
To see if a librarian has already identified digital primary sources related to your topic, do an Internet search for a term or phrase related to your research plus the phrase "research guide" or LibGuide.