TY  - BOOK
AU  - Walker,Arthur L.
AU  - Roach,J.Kenneth
AU  - Hanna,J.Marshall
TI  - How to use adding and calculating machines
SN  - 0070678251
AV  - HF5548 .W3 1979
U1  - 651.82 
PY  - 1979///
CY  - New York
PB  - Gregg Division, McGraw-Hill
KW  - Calculators
KW  - Problems, exercises, etc
ER  -