Dissertations and Theses are often considered unpublished original research work. Information derived from a study of the text needs the consent of the author in writing before it can be published. Dissertations are 1° literature sources.
Dissertation Abstracts – Full-Text (via ProQuest)
Covers doctoral dissertations completed in the
WorldCat (via FirstSearch)
Most comprehensive database contains holdings information from libraries around the world. Includes thesis, dissertations both nationally and internationally.
See also: Subject focused bibliographic databases often include dissertations.
For example: Argicola, BIOSIS Previews, ERIC.