TY  - BOOK
AU  - Chinn,William G.
TI  - Arithmetic and calculators : : how to deal with arithmetic in the calculator age / 
SN  - 0716700166
U1  - 513.0285 
PY  - 1978///
CY  - San Francisco : 
PB  - W. H. Freeman, 
KW  - Aritmética
KW  - Máquinas de calcular
KW  - Circuitos
ER  -