Changes in technology and labor requirements in the crushed-stone industry
- Författare
- Harry S. Kantor
- (Harry S. Kantor and Geoffrey A. Saeger)
- Språk
- Engelska
| Förlag | År | Ort | Om boken | ISBN |
|---|---|---|---|---|
| Works progress administration, National research project, in cooperation with Department of the interior, Bureau of mines | 1939 | USA, Philadelphia, Pa | xvii, 169 sidor. : incl. front., ill, tables, diagrs 26 cm |