Here's a great definition of primary sources from the American Library Association
--Using Primary Sources on the Web, rev. 2008.
Not sure how to work with primary sources? Here are some great tips:
These are a few primary sources available to you online.
Here are a few collections of source documents in the library:
For 1877-present, contemporary newspapers can be an excellent primary source for many topics. Read all about finding and using newspapers on our Newspapers Research Guide
.