URL

Titel

https://www.loc.gov/

Library of Congress

http://www.bl.uk/

British Library

http://www.lindahall.org/

Linda Hall Library

http://library.harvard.edu/

Harvard Library

http://libraries.mit.edu/

MIT Libraries

http://library.stanford.edu/

Stanford University Libraries

http://library.columbia.edu/

Columbia University Libraries

http://web.library.yale.edu/

Yale University Library

https://onesearch.library.utoronto.ca/

University of Toronto Libraries

http://www.ull.ac.uk/

Senate House Library (University of London)

http://www.lib.uwaterloo.ca/

University of Waterloo Library

http://www.library.ubc.ca/

UBC Library (University of British Columbia)

http://library.usask.ca/

University of Saskatchewan Library

http://www.lib.cam.ac.uk/

Cambridge University Library

http://www.mtu.edu/library/

Library-Michigan Technological University