Questia.com
Librarians Index
Xanedu.com
Ebrary.com
Perseus.org
Egloballibrary.com
Wiscasset Public Library
Reference Library
Portland Public Library
Bowdoin College
New York Public Library
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University of California
Orion at UCLA
Navy Department Library
Library Corp.
Law Library of St. Louis
Library of Congress
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MIT
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Peanut Press
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