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Permissible explosives, mining equipment, and apparatus approved prior to Jan. 1, 1923.

Bibliographic Details
Corporate Author:	United States. Department of Commerce
Format:	Government Document eBook
Language:	English
Published:	[Washington] : GPO, 1923.
Subjects:	Explosives. Lamps. Machinery. Mines and mineral resources. Electronic books.
Online Access:	Connect to the full text of this electronic document

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