Most books will not be available in full text, so you will probably have to search for relevant titles in WorldCat Discovery to see if they are available locally or to obtain them through Interlibrary Loan.
Note that only the abstract is available for dissertations, not the entire document. You would have to request the full document through Interlibrary Loan. For the most part, Dissertations are not acceptable as scholarly sources, although some may provide background information that would be useful
If we have a journal available through subscription or in one of our databases, there will be a link in the MLA database.
Websites in the MLA database have been reviewed by the indexers before being included. However, the links are not always updated after the original indexing. However, you can often find the site by searching for it by name and finding the new link if the site still exists.