The Mine Foreman's Handbook of Practical and Theoretical Information on the Opening, Ventilating, and Working of Collieries : Questions and Answers on Practical and Theoretical Coal Mining, Designed to Assist Students and Others in Passing Examinations for Mine Foremanships
The Mine Foreman's Handbook of Practical and Theoretical Information on the Opening, Ventilating, and Working of Collieries : Questions and Answers on Practical and Theoretical Coal Mining, Designed to Assist Students and Others in Passing Examinations for Mine Foremanships