Honsberger, Ross.
Polya's Footsteps : Miscellaneous Problems and Essays - USA Mathematical Assn. of America 1997 - 315
0 88385 326 4
Polya's Footsteps
51 HON
Polya's Footsteps : Miscellaneous Problems and Essays - USA Mathematical Assn. of America 1997 - 315
0 88385 326 4
Polya's Footsteps
51 HON