How to Solve It Autor George Polya 26 apr 1990 Paperback Preț: 59.92 lei 88.56 lei 22-33 zile | 6-12 zile -32%
The Stanford Mathematics Problem Book: With Hints and Solutions Dover Books on Mathematics Autor George Polya et al. 31 ian 2009 Paperback Preț: 40.04 lei 50.83 lei 3-4 săpt. | 6-12 zile -21%