Crawford, D J <br/><br/>
The radiological impact of 219Rn and its effect on 222Rn risk assessment.  [electronic resource] 

 -  Health physics  Jul 1981 
 - 165-71 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. 
<br/><br/><label>ISSN: </label>0017-9078 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air Pollution, Radioactive--analysis<br/>Protactinium<br/>Radon--analysis<br/>Risk<br/>Soil Pollutants, Radioactive