TY  - BOOK
T1  - Number combinations
T2  - Constructing ideas about. Grades 1-3
A1  - Ward, Sandra
LA  - English
PP  - Chicago (Ill.)
PB  - Creative Publications
YR  - 1995
UL  - https://gei-testing-vufind.eww-server.de/Record/manes89271
OP  - 103
SN  - 1561078069
KW  - Matemáticas
KW  - Primaria
ER  -