Search across many Helmke Library databases to find both primary sources and scholarly materials. After searching, try the filters at the left hand side. This is also a good place to look for items found in footnotes or a bibliography. If you don't find the full text of the item you're looking for, make a Document Delivery request.
HathiTrust is a digital archive created by a consortium of universities in the U.S. It is particularly useful for finding the full text of documents that are out of copyright and/or in the public domain.