To amend the Federal coal mine health and safety act of 1969.  Hearings, Ninety-second Congress, first session [on] H.R. 5680 ... 

 - Washington  U.S. Govt. Print. Off.  1971. 
 - iv, 341 p.  24 cm. 
<br/><br/> Hearings held in Washington, D.C., Mar. 9-11, 1971 and in Hazard, Ky., Mar. 12-13, 1971. 
<br/><br/><label>LCCN: </label>75613753  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal mines and mining--Safety regulations--United States.
<br/><br/><label>LC Class. No.: </label>KF27.E343 1971c 
<br/><br/><label>Dewey Class. No.: </label>344/.73/0465 
<br/><br/><label>Gov. Doc. Class. No.: </label>Y 4.Ed8/1:C63/3/971