ProQuest Dissertations and Theses
PQDT is a comprehensive collection of citations to dissertations and theses worldwide from 1861 to the present day. Full-text is available for most of the dissertations added since 1997 and some of the older graduate works. PQDT is also the official digital dissertations archive for the Library of Congress and the database of record for graduate research. Also included are the citations to British and Irish dissertations and theses (PQDT: UK & Ireland) since 1761 and abstracts for content since 1986.