Now is a great time to be researching history! Every day, more and more content that was previously accessible only in special collections and archives is now being scanned, digitized, and posted on the web.
Search for primary source documents both online and in the library catalog.
Search the online library catalog for your topic, then try adding one of the following words to your search to find collections of primary sources:
"documents," "sources," "letters," or "diaries"
e.g., "Korean War AND Sources" or "Civil War AND Diaries"
Don't forget to change the "Held By" selection to Libraries Worldwide to find books you might be able to obtain through interlibrary loan.