Glossary of mining terms
British Standards Institution
Glossary of mining terms /B. S. 3618: Section 2: 1963, Ventilation - London: British Standards Institution, 1963 - 16p.
Section-2,Ventilation
Ventilation purposes
Mining Mineral industry
D 001.4:622 / K3.1-K3-
Glossary of mining terms /B. S. 3618: Section 2: 1963, Ventilation - London: British Standards Institution, 1963 - 16p.
Section-2,Ventilation
Ventilation purposes
Mining Mineral industry
D 001.4:622 / K3.1-K3-