American Standard Safety Code for Installing and Using Electrical Equipment in and about Coal Mines (M2.1)

Revision of American Standard Safety Rules for Installing and Using Electrical Equipment in Coal Mines, M2-1926

by American Standards Association, Forrest Theodore Moyer, Ned H. Snyder, Russell Everett Morgan, Simon Harry Ash, G. D. Jones, John Ferdinand Barkley, Sebastian J. Aresco, W. L. Eaton, Ralph H. Whaite, Virginia E. Wrenn · 1951