derivative work of the following images: File:Ansel_Adams_-_National_Archives_79-AA-Q01.jpg licensed with PD-USGov-NPS 2011-05-28T00:54:40Z File Upload
Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. English determination method or standard: SHA-1
Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. English