Keeling, C D <br/><br/>
Climate change and carbon dioxide: an introduction.  [electronic resource] 

 -  Proceedings of the National Academy of Sciences of the United States of America  Aug 1997 
 - 8273-4 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0027-8424 
<br/><br/><label>Standard No.: </label>10.1073/pnas.94.16.8273  doi