Methane in California gold mines /
by Byron O. Pickard and E.D. Gardner.

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Main Author: Pickard, Byron O., 1882-
Related Names: Gardner, E. D. (Eugene Delos), 1885-, joint author.
United States. Bureau of Mines.
Language(s): English
Published: Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, 1921.
Subjects: Mine gases > Mine gases / Measurement.
Mine gases > Mine gases / Flammability.
Mine gases.
Gas bursts.
Firedamp.
Methane.
Mine ventilation.
Gold mines and mining > Gold mines and mining / California.
Gold mines and mining.
Note: "December, 1921."
Physical Description: 6 p. ; 27 cm.
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