ProQuest Dissertations & Theses A&I This link opens in a new window 1861 - present. Lists most U.S. dissertations, and many dissertations and master's theses from Canada, Great Britain and continental Europe. Abstracts included 1980-present. Includes full text for all UC dissertations, at no charge, 1997 - present. British and Continental European dissertations covered 1988 - present. Masters theses listed selectively from 1988.