Author:John J. O'Brien

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John J. O'Brien
(c. 1876 – )

American police and military instructor and jujutsuka


  • A Complete Course of Jiu-Jitsu and Physical Culture (1905) (external scan)

Some or all works by this author are in the public domain in the United States because they were published before January 1, 1928.

These works may be in the public domain in countries and areas with longer native copyright terms that apply the rule of the shorter term to foreign works.