Action of Acid Mine Water on the Insulation of Election Conductors: A Preliminary Report (Classic Reprint) Clark H. H. Heftet / 2019 / Engelsk
Electrical Section of the Bureau of Mines: Its Purpose and Equipment (Classic Reprint) Clark H. H. Heftet / 2018 / Engelsk
Permissible Explosion-Proof Electric Motors for Mine: Conditions and Requirements for Test and Approval (Classic Reprint) Clark H. H. Innbundet / 2018 / Engelsk
Action of Acid Mine Water on the Insulation of Election Conductors: A Preliminary Report (Classic Reprint) Clark H. H. Innbundet / 2019 / Engelsk
Factor of Safety in Mine Electrical Installations (Classic Reprint) Clark H. H. Heftet / 2018 / Engelsk
Ignition of Mine Gases by the Filaments of Incandescent Lamps (Classic Reprint) Clark H. H. Heftet / 2019 / Engelsk
Factor of Safety in Mine Electrical Installations (Classic Reprint) Clark H. H. Innbundet / 2018 / Engelsk
Shot Firing in Coal Mines by Electricity Controlled From Outside (Classic Reprint) Clark H. H. Heftet / 2022 / Engelsk
Ignition of Mine Gases by the Filaments of Incandescent Lamps (Classic Reprint) Clark H. H. Innbundet / 2019 / Engelsk
Permissible Explosion-Proof Electric Motors for Mine: Conditions and Requirements for Test and Approval (Classic Reprint) Clark H. H. Heftet / 2018 / Engelsk
Shot Firing in Coal Mines by Electricity Controlled From Outside (Classic Reprint) Clark H. H. Innbundet / 2018 / Engelsk
