Coal mine health and safety.

Coal mine health and safety. Hearing, Ninety-first Congress, first session ... Sept. 9, 1969. - Washington U.S. Govt. Print. Off. 1969. - iii, 100 p. illus. 24 cm.

Hearing on H.R. 4047, 4295, and 7976.

71604503


Coal mines and mining--Safety regulations--United States.

KF27.E3 1969b

622/.33/5

Y 4.Ed 8/1:C 63/4/969
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