Safe use of alternating-current type of coal-cutting equipment.

Bibliographic Details

Corporate Author:	United States. Department of Commerce
Format:	Government Document eBook
Language:	English
Published:	[Washington] : [publisher not identified], 1920.
Series:	Mines Bur. Rpt. of Investigation No. 2123
Subjects:	Coal mines and mining. Machinery. Mine accidents. Electronic books.
Online Access:	Connect to the full text of this electronic document