What to solve?:
Cofman, Judita
What to solve?: problems and suggestions for young mathematicians / by Judita Cofman - Oxford : Clarendon Press, 1990.
Mathematics Mathematics - Problems, Exercises Problem - Solving
510
What to solve?: problems and suggestions for young mathematicians / by Judita Cofman - Oxford : Clarendon Press, 1990.
Mathematics Mathematics - Problems, Exercises Problem - Solving
510