This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
sdasm aviation aeronautics san diego air and space museum sandiegoairandspacemuseum ryan lindbergh blackandwhite monochrome text document writing outdoor black and white Flight certificate stating that Mary Sherrett has flown over San Diego photo copy. Photo from the ampquotEarly Daysampquot of Ryan Aeronautical Repository San Diego