LibraryThing Libraries
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Amazons: Amazon.com, Amazon.co.uk, Amazon.ca, Amazon.fr, Amazon.de, Amazon.co.jp

Library of Congress: Library of Congress

Other English: United States: Boston Athenaeum, Boston University, Brown University, Caltech, ILCSO (Illinois Libraries), Columbia (CLIO), Johns Hopkins University, MIT, National Library of Medicine, NIH, Tufts University, University of California, University of Chicago, Washington Research Library Consortium (D.C.), Yale University

Britain: Durham University, London School of Economics, National Art Library, National Library of Scotland, National Library of Wales

Canada: Canadian National Catalogue, CISTI (Science), University of Calgary, Université de Montréal

Australia: National Library of Australia, Australian National University

Ireland: Trinity College, Dublin — South Africa: University of Pretoria — Pakistan: Bahria University, Pakistan

French: Canadian National Catalogue, Catholic University Leuven, NEBIS (Switzerland), Université Libre de Bruxelles

Spanish: Biblioteca de Castilla y Leon, Universidad Autónoma de Madrid, Universidad Carlos III de Madrid, Universidad de Alicante, Universidad de Chile

German: NEBIS (Switzerland), Universität Basel

Dutch: Catholic University Leuven

Swedish: Göteborg University, LIBRIS, svenska forskningsbibliotek, Stockholm University

Italian: NEBIS (Switzerland)

Danish: Det Kongelige Bibliotek,

Finnish: Helsinki Metropolitan Libraries

Turkish: Istanbul Bilgi University, Koç University

Polish: National Library of Poland

Testing: TestMe, National Library of the Czech Republic, Italian National Library Service, BNF, National Library for the Blind, COPAC, University College Gallway, Folger Shakespeare Library, Oxford University, National Library of Norway (Norbok), Accademia della Crusca Firenze, Metro Boston Library Network, Finnish University Libraries (Linnea), Union Catalogue of Finnish University Libraries (LINDA)