Coal mine health and safety.
Subtitle: Hearing, Ninety-first Congress, first session ... Sept. 9, 1969.
Publisher: U.S. Govt. Print. Off.
Published: 1969
Place of publication: Washington
Language: eng
Number of pages: 100
Subjects: Coal mines and mining -- Safety regulations -- United States.
Notes: Hearing on H.R. 4047, 4295, and 7976.