
ProQuest Dissertations and Theses is the most comprehensive collection of graduate research produced by Canadian and American universities. PQDT contains records for 2.4 million dissertations and Master's theses from all fields of study, which have been submitted by hundreds of leading academic institutions from around the world. More than 700,000 of these dissertations and theses are available for download as full-text 24-page previews while many more contain lengthy abstracts. This resource contains citations from 1861 to present day.