Centre for Research Libraries: Representing over 90 countries and 1200 institutions, the CRL has catalogue records for over 800,000 foreign doctoral dissertations.
Dart Europe: A partnership of library consortia working together to improve global access by providing a single European portal for discovery of European research theses.
EThOS: The UK’s national thesis service containing approximately 400,000 records relating to 120 institutions of which around 160,000 are full text.
OAIster: A union catalogue of difficult to find digital resources including theses: Under ‘Content’, narrow searches to ‘thesis/dissertations’.
OATD (Open Access Theses and Dissertations): Free access to a growing number of theses online. Many from USA colleges, but also includes other regions. Includes both doctoral and masters theses.
OCLC WorldCat: All dissertations, theses and published material based on theses catalogued by OCLC members. Over 8 million records covering all subjects.
Networked Digital Library of Theses and Dissertations (NDLTD): An international organisation dedicated to promoting the adoption, creation, use, dissemination and preservation of electronic theses and dissertations (ETDs).
PDQT Open: provides the full text of open access dissertations and theses free of charge, downloadable in PDF format.
ProQuest Dissertations & Theses Global (PQDT): offers over 5 million citations and 3 million full-text works from thousands of universities.
Registry of Open Access Repositories: Hosted by the University of Southampton, ROAR lists international institutional repositories containing electronic theses.