Greninger, Nevin <br/><br/>
Measurement of incombustible content of coal mine dust samples 
Greninger, Nevin 
 - Washington  Bureau of mines  1988 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CONTROL DE POLVO 
<br/><br/><label>Universal Decimal Class. No.: </label>622.807