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. 
<br/><br/> Hearing on H.R. 4047, 4295, and 7976. 
<br/><br/><label>LCCN: </label>71604503  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal mines and mining--Safety regulations--United States.
<br/><br/><label>LC Class. No.: </label>KF27.E3 1969b 
<br/><br/><label>Dewey Class. No.: </label>622/.33/5 
<br/><br/><label>Gov. Doc. Class. No.: </label>Y 4.Ed 8/1:C 63/4/969