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Links for further reading and additional information
WIPO (2017). Summary of the Berne Convention for the Protection of Literary and Artistic Works (1886). Online: http://www.wipo.int/treaties/en/ip/berne/summary_berne.html
Project Gutenberg (2017). Copyright How-To. Online: https://www.gutenberg.org/wiki/Gutenberg:Copyright_How-To
U.S. Library of Congress (2011). Duration of Copyright (circular 15a). Online: https://www.copyright.gov/circs/circ15a.pdf
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