Industrial ventilation, a manual of recommended practice 

 - 11nd 
 -  American Conference of Governamental Industrial Hygienist,  1970 
<br/><br/><label>Subjects--Topical Terms: </label><br/>INDUSTRIAL VENTILATION<br/>INDUSTRIAL BUILDING-HEATING<br/>INDUSTRIAL BUILDING-VENTILATION<br/>VENTILACION INDUSTRIAL
<br/><br/><label>Universal Decimal Class. No.: </label>697.94 IN2 1970