Office machines course : full keyboard adding listing machine, ten-key adding listing machine, crank-driven calculator, key-driven calculator
Wedi'i Gadw mewn:
| OCLC: | 3590419 |
|---|---|
| Prif Awdur: | |
| Iaith: | English |
| Cyhoeddwyd: |
Cincinnati : New York,
South-western Pub. Co. ;
[c1942]
|
| Pynciau: | |
| Fformat: | Monograph Note that CRL will digitize material from the collection when copyright allows. |