Philadelphia workers in a changing economy .
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
Philadelphia
University of Pennsylvania Press
[1956].
|
| Cyfres: | Industrial Research Dept. Wharton School of Finance & Commerce, University of Pennsylvania. Resaerch studies,38
|
| Pynciau: |