Dialog® Dissertations & Theses

The most comprehensive online dissertation collection available today

We offer more than three million citations to dissertations and theses from around the world, plus the full text for more than one and a half million dissertations. Nearly 90,000 new full text graduate works are added to the database each year. ProQuest is the leader in the field, with a history of preserving and enabling accessibility for dissertations that stretches back more than 70 years. In fact, ProQuest is designated as an official offsite repository by the U.S. Library of Congress. Only a fraction of the dissertations available on ProQuest Dissertations and Theses Professional are available on the open web or via academic institutions. ProQuest offers full text searchable access to the most comprehensive collection of dissertations available.

Key collections

ProQuest Dissertations & Theses Professional

ProQuest is designated as an official offsite dissertation repository by the U.S. Library of Congress and is the database of record for graduate research. Our 1.5 million full-text dissertations go back as far as 70 years and nearly 90,000 new full text graduate works are added each year.


A Cited Reference Science Database
SciSearch is a major international database of science, technology, biomedicine and related disciplines. Unlike other sources, SciSearch includes each article’s cited references in addition to the usual bibliographic data. More than 5,200 journals are covered.

Flexible pricing

Flexible pricing to suit every budget

We offer flexible pricing models for content access designed to suit every budget and need—from subscription models to a range of transaction-based pricing options including commitment plans.

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