Final report of the National Committee on Steep Seam Working in British Coal Mines. 

 - London :  H.M.S.O.,  1978. 
 - 23p. 
<br/><br/><label>ISBN: </label>0118820109 (sd) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal mines and mining--Safety measures.--Great Britain