TY  - BOOK
AU  - Bell, Max S.
AU  - Fuson, Karen C.
AU  - Lesh, Richard A. 
TI  - Algebraic and Arithmetic Structures : a concrete approach for elementary school teachers
SN  - 0029022703
AV  - QA135.5 .B45 1976
PY  - 1976///
CY  - New York
PB  - Free Press
KW  - Mathematics
KW  - study and teaching
ER  -