Ventilation of Mines: Designed for Use in Schools and Colleges; And for Practical Mining Men in Their Study of the Subject (Classic Reprint) Beard, James T. Heftet / 2019 / Engelsk
Mine Gases And Ventilation; Textbook For Students Of Mining, Mining Engineers And Candidates Preparing For Mining Examinations Designed For Working Out The Various Problems That Arise In The Practice Of Coal Mining Beard, James T. Heftet / 2007 / Engelsk
Ventilation of Mines: Designed for Use in Schools and Colleges; And for Practical Mining Men in Their Study of the Subject (Classic Reprint) Beard, James T. Innbundet / 2019 / Engelsk
