Numbers and Shapes Revisited: More Problems for Young Mathematicians Autor Judita Cofman 29 mar 1995 Paperback Preț: 204.24 lei 6-8 săpt.
What To Solve?: Problems and Suggestions for Young Mathematicians Autor Judita Cofman 9 mai 1990 Paperback Preț: 331.75 lei 6-8 săpt.