An Investigation into the usefulness of safety posters designed for Bantu industrial workers by the National Occupational Safety Association
- Författare
- Heinz Hector
- (H. Hector and W. Hudson.)
- Språk
- Engelska
| Förlag | År | Ort | Om boken | ISBN |
|---|---|---|---|---|
| National Inst. for Personnel Research | 1962 | Utgivningsland okänt / Ej specificerat, Place of publication not identified | 23 pages |