工程与技术Practical coal mining: a manual for managers, under-managers, colliery engineers, and others. By George L. Kerr ... With numerous problems aGeorge L Kerr![Practical coal mining: a manual for managers, under-managers, colliery engineers, and others. By George L. Kerr ... With numerous problems a]()
Practical coal mining: a manual for managers, under-managers, colliery engineers, and others. By George L. Kerr ... With numerous problems a
George L Kerr
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《Practical coal mining: a manual for managers, under-managers, colliery engineers, and others. By George L. Kerr ... With numerous problems a》,George L…
书目信息
- 作者
- George L Kerr
- 分类
- 工程与技术
- 语言
- 英语
- 来源
- HathiTrust