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Rock-dust barriers for coal mines.

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Bibliographic Details
Online Access: Full Text (via ProQuest)
Other Authors: Greenwald, H. P. (Harold Putnam), 1893-, Howarth, H. C. (Henry C.), 1879-, Rice, George Samuel, 1866-
Format: Government Document eBook
Language:English
Published: Washington, D.C. : [s.n.], 1930.
Series:Mines Bur. Rpt. of Investigation No. 2977.
Subjects:
Mineral dusts.
Description
Item Description:Record is based on bibliographic data in ProQuest U.S. Executive Branch Documents, 1910-1932. Reuse except for individual research requires license from ProQuest, LLC.
[On structures and apparatus to confine coal-dust explosions]
Physical Description:1 online resource (14 p.), digital, PDF file.

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