Lisa Hefendehl-Hebeker - Vol. 11 Num. 1 (1991) | ||
Negative numbers: obstacles in their evolution from intuitive to intellectual constructs | 26-32 |
Lisa Hefendehl-Hebeker - Vol. 11 Num. 1 (1991) | ||
Negative numbers: obstacles in their evolution from intuitive to intellectual constructs | 26-32 |