Williamson, D E <br/><br/>
Patents.  [electronic resource] 

 -  Applied optics  Oct 1971 
 - A27 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1559-128X 
<br/><br/><label>Standard No.: </label>10.1364/AO.10.000A27  doi