ProQuest Dissertations & Theses Global
Index to PhD dissertations from across the US and a few from other countries, with coverage back to 1861. For dissertations published since 1997, full text may be available. For most Iowa State University Ph.D. dissertations published since 1916, citations and abstracts, a 24-page preview, and the option to download the full text are available. ISU masters' theses are also included in full text, beginning with Fall 2006.