Basic facts on productivity change.
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
New York
National Bureau of Economic Research
c1959.
|
| Cyfres: | National Bureau of Economic Research. Occasional paper, no. 63
|
| Pynciau: |