California:

University of California, Berkeley, Bancroft Library, Berkeley, California. www.bancroft.berkeley.edu

Stanford Universtity, Green Library, Stanford, California. www.library.stanford.edu/green

New York:

Columbia Universtity, Rare Book & Manuscript Library, New York, New York. www.columbia.edu/libraries/rbml.html

New York Public Library, Periodicals Division, New York, New York.  www.nypl.org

University at Buffalo, the State University of New York, Lockwood Library, Buffalo, New York.   ublib.buffalo.edu/libraries/units/lml

Rhode Island:

Brown University, Rockefeller Library, Providence, Rhode Island.  dl.lib.brown.edu/libweb/about/rock

Vermont:

Center for Cartoon Studies, Schulz Library, White River Junction, Vermont.  www.cartoonstudies.org/schulz/schulz.html

Ohio:

The Ohio State University Libraries, 1858 Neil Avenue Mall, Columbus, Ohio. www.libraryohiou.edu/find

Wisconsin:

University of Wisconsin, Madison, Memorial Library, Madison, Wisconsin. memorial.library.wisc.edu

Iowa:

University of Iowa Libraries, 100 Main Library, Iowa City, Iowa. www.lib.uiowa.edu/locations/main

London, England:

University College London, Periodicals Department, Gower Street, London, WC1E 6BT, United Kingdom. library.ucl.ac.uk