TY  - MON
AU  - Crossley, John Thomas
AU  - Martin, William
TI  - The intellectual calculator
PY  - 0000///[s.d.]
CY  - London
PB  - Depositary of British and Foreign School Society
KW  - Aritmética
KW  - 511.1
SP  - 146 p.
PP  - London
PB  - Depositary of British and Foreign School Society
ER  -