Copyright-free (著作権フリー) is a conventional expression extensively used in Japan that the author say their works can be used freely regardless of copyright. It is distinguished from public domain.
... by Paul Buhle: Nonviolent Activist.
1999, May 01 - "Annual Dinner And Peace Award Ceremony: A Celebration Of David McReynolds" - Pamphlet: War Resisters League.
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