Front cover image for Health and safety in the coal mines : hearing, Ninety-first Congress, second session

Health and safety in the coal mines : hearing, Ninety-first Congress, second session

Print Book, English, 1971
U.S. G.P.O., Washington, 1971
Government publications United States
vii, 814 pages : illustrations ; 23 cm
1109150930
Hearings held June 26-Aug. 17, 1970 in various cities