How to Solve it Princeton Science Library Autor G. Polya et al. noi 2014 Paperback Preț: 116.83 lei 3-5 săpt. | 6-10 zile
Mathematics and Plausible Reasoning, Volume 2 Autor G. Polya 23 aug 1990 Paperback Preț: 351.44 lei 6-8 săpt.