Abbot, C G <br/><br/>
The Smithsonian ;Solar Constant' Expedition to Calama, Chile.  [electronic resource] 

 -  Proceedings of the National Academy of Sciences of the United States of America  Oct 1918 
 - 313-6 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0027-8424 
<br/><br/><label>Standard No.: </label>10.1073/pnas.4.10.313  doi