American Doctoral Dissertations (ADD) provides citations to virtually all U.S. dissertations for the academic year, regardless of publisher.  ADD is one of the printed reference tools related to the ProQuest Dissertations & Theses database. Published annually in hardcover and compiled primarily from the ProQuest Dissertation Publishing Program, as well as information provided by universities, ADD lists virtually all dissertations written in the U. S. during the academic year, whether or not ProQuest Information and Learning published them.