Volkwein, Jon C. <br/><br/>
Dust protection afforded by enclosed cabs on surface and underground mine machinery (BM-TPR 109) 
Volkwein, Jon C. 
 - Washington  Bureau of mines  1979 
<br/><br/><label>Subjects--Topical Terms: </label><br/>VENTILACION EN LAS MINAS<br/>MAQUINAS Y HERRAMIENTAS
<br/><br/><label>Universal Decimal Class. No.: </label>622.4