GAS MASK for a hospital.  [electronic resource] 

 -  Hospital management  Nov 1957 
 - 92 passim p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0018-5744 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Charcoal<br/>Hospitals<br/>Humans<br/>Respiratory Protective Devices