- Tomorrow's Math: Unsolved Problems for the Amateur by Charles Stanley Ogilvy,  1972-02
 - Tomorrow's Math: Unsolved Problems for the Amateur 
 - Math Odyssey 2000: Puzzles, Mysteries, Unsolved Problems, Breakthroughs, and the People of Mathematics by Clement W. Falbo,  1994-01
 - Tomorrows Math 2ND Edition Unsolved Problems Fro by C Stanley Ogilvy,  1972
 - Unsolved Problems of Noise and Fluctuations: UPoN'99: Second International Conference, Adelaide, Australia 11-15 July 1999 (AIP Conference Proceedings) 
 - Math Odyssey Two Thousand ,Puzzles, Mysteries, Unsolved Problems, Breakthroughs, &the People of Mathematics 1994 publication by ClementW.Falbo,  1994-01-01
 - Old and New Unsolved Problems in Plane Geometry and Number Theory (Dolciani Math by Victor Klee; Stan Wagon,  1996-01-01
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