Archive for the ‘Free e-books’ Category

500 Sudoku Puzzles

30/03/2012

|566 pages  | PDF |1 MB|Download

102 Combinatorial problems

29/03/2012

|148 pages  | PDF |0.7 MB|Download

Principles of combinatorics

27/03/2012

|189 pages  | PDF |2 MB|Download