ProQuest holds the earliest and biggest collection of doctoral and master’s dissertation around the world. The database of ProQuest Dissertations and Theses (PQDT) covers more than 2000,000 abstract index of America. It has been the most widely used dissertations database.

Some full-text dissertations of PQDD can be obtained from academic dissertation database of ProQuest. Chinese member of library alliance participating in the joint purchase program can share in all dissertation resources ordered by the ProQuest database.