Health and safety in the coal mines.
Subtitle: Hearing. Ninety-first Congress, second session ...
Publisher: U.S. Govt. Print. Off.
Published: 1971
Place of publication: Washington
Language: eng
Number of pages: 814
Subjects: Coal mines and mining -- Safety regulations -- United States.
Notes: Hearings held June 26-Aug. 17, 1970 in various cities.