En
Ru| Description |
Protection of the life and health of workers in industry.Part 3: Mining.Ext.1. - St. Petersburg.: Type.P.P. Soykina, 1914. -Content: Sk.2..Electronic copy source: GPNTB of Russia
|
|---|---|
| Publisher | СПб. : Тип. П. П. Сойкина |
| Description |
Protection of the life and health of workers in industry.Part 3: Mining.Ext.1. - St. Petersburg.: Type.P.P. Soykina, 1914. -Content: Sk.2..Electronic copy source: GPNTB of Russia
|
|---|---|
| Publisher | СПб. : Тип. П. П. Сойкина |