Gill, George H. <br/><br/>
Dust :   and its effectes on the respiratory system 

 - London :   H.K.Lewis,   1947. 
 - 50 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>HIGIENE INDUSTRIAL<br/>POLVO<br/>SISTEMA RESPIRATORIO<br/>CONTAMINACION DEL AIRE
<br/><br/><label>Universal Decimal Class. No.: </label>613.6