Hartman, Howard L. <br/><br/>
Mine ventilation and air conditioning   
by Howard L. Hartman 
 - New York  John Wiley  1961 
 - x, 398p. 
<br/><br/><label>ISBN: </label>0471066990 
<br/><br/><label>LCCN: </label>61-6787 
<br/><br/><label>Dewey Class. No.: </label>622.42  / N61