Unlike DAI , abstracts are included only for titles completed since July 1980, although like CDI , bibliographic data for titles is included for dissertations back to 1861. It also includes citations and abstracts for masters theses drawn from University Microfilms' Masters Abstracts International .
Dissertation abstracts international .
Ann Arbor, University Microfilms International. A microfilm copy of each dissertation submitted is produced by UMI and made available for sale, in either microfilm or hard copy. A complete list of institutions participating in this UMI program at any given time can be found in the introductory pages of any issue of DAI, although inclusion in this list doesn't necessarily mean that all departments of a given institution participate. DAI is arranged by broad subject area, and each issue contains an author index and a keyword index to words in the title of each dissertation. Abstracts are also included, usually written by the author.