Hours of work in the P.T.T. services /
| Institution: | International Institute of Social History |
|---|---|
| Format: | TEXT |
| Published: |
Postal, Telegraph and Telephone International,
1950.
Berne : |
| Subjects: | |
| Online Access: | http://hdl.handle.net/10622/AB1A9A37-74DD-44BC-9232-DF9C492DAB7A |