Major Canadian and U.S. libraries
- WorldCat (U of T only) or WorldCat (public version)
- Voila (Library and Archives Canada)
- Bibliothèque et Archives nationales du Québec
- Canada Institute for Scientific & Technical Information (CISTI)
- Center for Research Libraries (CRL)
- U.S. Library of Congress
- U.S. National Library of Medicine
Toronto and Southern Ontario libraries
- Toronto Public Library
- Brock University Library
- McMaster University Libraries
- Ontario College of Art and Design
- Queens University Library
- Royal Military College Libraries
- Ryerson University Library
- Trellis: Guelph, Wilfrid Laurier, and Waterloo
- Trent University Library
- University of Western Ontario Library
- University of Windsor Library
- York University Library
Other library catalogues
- Directory of Libraries (IFLA) (Union and National Catalogues by Country)
- Bibliothèque nationale de France
- British Library
- COPAC: UK and Ireland
- European Library: The Gateway to Europe's National Libraries
- Karlsruher Virtueller Katalog: German, Swiss, Austrian and world libraries
- LibDex (The Library Index)
- SUDOC: Systeme Universitaire de Documentation