Fires, gases, and ventilation in metal and nonmetallic mines Page: Title Page
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Miners' Circular 55
BUREAU OF MINES
FIRES, GASES, AND VENTILATION
IN METAL AND
Metal- and Nonmetallic-Mine Accident-Prevention
(Revised January 1955)
UNITED STATES GOVERNMENT PRINTING OFFICE
WASHINGTON : 1957
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United States. Bureau of Mines. Fires, gases, and ventilation in metal and nonmetallic mines, report, 1957; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc40320/m1/2/: accessed May 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.