Rajan, R S <br/><br/>
Detection of 4He in stratospheric particles gives evidence of extraterrestrial origin.  [electronic resource] 

 -  Nature  May 1977 
 - 133-4 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0028-0836 
<br/><br/><label>Standard No.: </label>10.1038/267133a0  doi