Metadata from over 600 colleges, universities, and research institutions.
Many of these schools’ records come from their own repositories. Others come from regional or national ETD consortia, or from a set of ETD catalog records provided by OCLC Worldcat. With few exceptions, records are harvested from these sites using a standard called the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH).
Additional resources to find theses:
Proquest Dissertations and Theses, dissertations and theses published electronically or in print.
NDLTD, Networked Digital Library of Theses and Dissertations, electronic theses and dissertations, both open access and not.