Ng, Daniel <br/><br/>
Mine ventilation computer code for personal computers 
Ng, Daniel 
 - Washington  Bureau of mines  1989 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA<br/>PROGRAMA DE COMPUTADORA<br/>VENTILACION DE MINAS
<br/><br/><label>Universal Decimal Class. No.: </label>622:004.51