What do we know about the explosibility of coal dust in mines? /
by H.P. Greenwald.

Description

Main Author

Greenwald, H. P. (Harold Putnam), 1893-

Language(s)

English

Published

[Washington, D.C.] : U.S. Dept. of Commerce, Bureau of Mines, 1929.

Subjects

Coal mines and mining.
Mine explosions.

Physical Description

7 p. ; 27 cm.

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