Cook, Marcy
Arithmetornos D : Ecuaciones /
MAry Cook.
- Mountain View, CA : Creative Pub, 1995.
- ill. ; 24 (pt.1) ; 24 (pt.2)
- Mathland .
1-56107-647-3
Arithmetic -- Problems, exercises, etc.--Study and teaching
Spanish language -- Reading materials
TR(GS 513.146 / COO771 1995