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Access to nearly 3 million searchable citations, the most comprehensive collection of doctoral dissertations and master's theses in the world. Dissertations from 1980 forward include 350-word abstracts and Master's theses from 1988 forward include 150-word abstracts. Full text for most dissertations since 1997 with 1.2 million full text dissertations available for download in PDF format. Approximately 70,000 new dissertations and theses are added each year. Coverage from 1743 to the present.