This is a small selection of books, some of which are eBooks and others can be checked out, that may be applicable to your research.
Google Books - Discover thousands of book titles here and see if we own them (note: Google Books does not let you read entire books)
Texshare - Check out a book from almost anywhere in Texas with one of these cards. Click for information.
Worldcat Searches thousands of libraries - built-in interlibrary loan request button allows you to get material we don't own.