Yazar
ohio mine examining board
4 cilt bulundu.
Cilt sonuçları
The mine foremen's guide for coal mines
Ohio. Mine Examining Board · Dept. of Industrial Relations, Division of Mines
164 sayfa · 1960
Kategori yok
The mine foremen's guide for open pit and auger mining
Ohio. Mine Examining Board · Dept. of Industrial Relations, Division of Mines
90 sayfa · 1960
Examinations, questions / Strip mining / Mining engineering
The mine foremen's guide for stone quarries and sand and gravel pits
Ohio. Mine Examining Board · Dept. of Industrial Relations, Division of Mines
73 sayfa · 1960
Quarries and quarrying / Strip mining / First aid in illness and injury
The mine foremen's guide for stone mining
Ohio. Mine Examining Board · Dept. of Industrial Relations, Division of Mines
153 sayfa · 1960
Examinations, questions / Industrial Supervisors / Mining engineering / Quarries and quarrying / Supervisors, Industrial