Riken gas indicator (types 17, 18 and 21) /
by Staff, Audio Visual Office-Education and Training.

Description

Corporate Author

United States. Mining Enforcement and Safety Administration.

Language(s)

English

Published

[Washington] : U. S. Dept. of the Interior, Mining Enforcement and Safety Administration, 1976.

Subjects

Mine gases.

Note

"Revised February 1976".

Physical Description

iii, 19 p. ; 27 cm.

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