Model code of safety regulations for underground work in coal mines for the guidance of governments and of the coal-mining industry. 

 - Geneva,  1950. 
 - ix, 102 p.  25 cm. 
<br/><br/><label>LCCN: </label>l  50000138  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal mines and mining--Safety measures.
<br/><br/><label>LC Class. No.: </label>HD7269.M615  / I5 
<br/><br/><label>Dewey Class. No.: </label>622.8