With more than 1.5 million entries, UMI's Dissertation Abstracts database is the one central, authoritative source for information about doctoral dissertations and master's theses. The database includes citations for materials ranging from the first U.S. dissertation, accepted in 1861, to those accepted as recently as last semester; those published from 1980 forward also include 350-word abstracts, written by the author. Citations for master's theses from 1988 forward include 150-word abstracts. Of the 1.5 million titles listed, UMI offers over a million in full text. For these titles, the database citation includes UMI's order number. Titles published since 1997 are available in in PDF format and have 24 page previews available.
Drexel dissertations are available in full text from 1997.