Permissible mine equipment approved during the calendar year 1947 :
supplement to Information Circular 7432 /
by A B. Hooker.

Description

Main Author

Hooker, A. B.

Related Names

United States. Bureau of Mines.

Language(s)

English

Published

[Washington, D.C.] : U.S. Dept. of the Interior, Bureau of Mines, 1947.

Subjects

Mine safety.
Mining machinery.
Coal mines and mining > Coal mines and mining / Safety measures.

Physical Description

5 p. : 27 cm.

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