Simon, Nancy <br/><br/>
Incorrect representation of Barrier Canyon rock art site's history and other factors invalidate reported dates.  [electronic resource] 

 -  Proceedings of the National Academy of Sciences of the United States of America  Dec 2014 
 - E5602-3 p.  digital 
<br/><br/> Publication Type: Letter; Comment 
<br/><br/><label>ISSN: </label>1091-6490 
<br/><br/><label>Standard No.: </label>10.1073/pnas.1420818112  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geologic Sediments<br/>Luminescence<br/>Radiometric Dating--methods