ProQuest Dissertations & Theses A&I
With more than 2 million entries, this is the single, central, authoritative resource for information about doctoral dissertations and master's theses. Dissertations published from 1980 forward include 350- word abstracts written by the author. Master's theses published from 1988 forward include 150-word abstracts. Titles available as native or image PDF formats include free twenty-four page previews. UMI offers over 1.8 million titles for purchase in microform, paper or electronic formats.