TY  - BOOK
AU  - MARTINEZ, SANCHEZ, JORGE
TI  - Conjuntos 1 
SN  - 9682432324
AV  - QA241 N271c n°1 
CY  - Mexico 
PB  -  Trillas
KW  - 1. Aritmetica - Cimentos
N1  - Traduccion de: Topics in mathematics for elementary school teachers booklet
ER  -