ProQuest Dissertations & Theses GlobalIncludes millions of searchable citations to dissertation and theses from around the world from 1861 to the present, together with over a million full text dissertations that are available for download in PDF format. The database offers full text for most of the dissertations added since 1997 and strong retrospective full text coverage for older graduate works. Each dissertation published since July 1980 includes a 350-word abstract written by the author. Master's theses published since 1988 include 150-word abstracts. Simple bibliographic citations are available for dissertations dating from 1637. Where available, this database provides 24-page previews of dissertations and theses