Pomroy, William H. <br/><br/>
Improvinciaed stench fire warning for underground mines 
Pomroy, William H. 
 - Washington  Bureau of mines  1985 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA<br/>RIESGO DE INCENDIOS
<br/><br/><label>Universal Decimal Class. No.: </label>622.82