American Library Association

Arcade: New York Art Resources Consortium Arcade unites the collections of the Frick Art Reference Library and the libraries of the Brooklyn Museum and The Museum of Modern Art.

Biblioteka Universytecka UMK

Bibliothèque nationale de France

Bibliothèque nationale du Québec

BRITISH LIBRARY

Columbia University Library

Concordia University Libraries

COPAC - a union catalogue: 24 of the largest university research libraries in the UK and Ireland PLUS the British Library & the National Library of Scotland.

Dalhousie University Libraries

DIMDI - Deutsches Institut für Medizinische Dokumentation und Information

DSpace at MIT MIT's digital repository - MIT Libraries

Harvard Libraries

Internet Archive

Internet Public Library

Librarians' Index to the Internet

Library and Archives Canada - AMICUS

Library of Congress

Library of Early Journals - A digital library of 18th and 19th Century journals

McGill University Library

Melvyl - Catalog of the University of California Libraries

New York Public Library

On-line Books Page (onlinebooks.library.upenn.edu)

Public Library of Science

Questia - Online Library of Books and Journals

UMass Amherst Digital Library

University of Buffalo Libraries

University of California (Berkeley) Library

University of Virginia - Electronic Text Center

University of Washington Libraries

Virtual Library of Botany (Biosciences)

Wellcome Library for the History and Understanding of Medicine

WWW Virtual Library