Proquest Dissertations and Theses
Includes citations for dissertations from 1861 to those accepted as recently as last semester. Abstracts from 1980 - present. The database represents the work of authors from over 1,000 North American graduate schools and European universities, from a diverse array of academic subjects including literature, languages, art history, music history, philosophy, history, mathematics, psychology, and science. A subset of these documents is publicly available using the website PQDT Open.