Bowers, E.T. <br/><br/>
Safety aspects of pneumatic transport 
Bowers, E.T. 
 - Washington  Bureau of mines  1985 
<br/><br/><label>Subjects--Topical Terms: </label><br/>SEGURIDAD EN LAS MINAS<br/>TRANSPORTE NEUMATICO<br/>MINERIA
<br/><br/><label>Universal Decimal Class. No.: </label>622.648.6