TY  - GEN
AU  - Copeland, Richard W
TI  - Mathematics and the elementary teacher
SN  - 0721626963
U1  - 510 
PY  - 1972///
CY  - Philadelphia
PB  - W.B. Saunders
KW  - ELEMENTARY MATHEMATICS
KW  - Mathematics
KW  - rational numbers
ER  -