BY-SA 4.0 Creative Commons Attribution-Share Alike 4.0 truetrue English Model of Ellsworth's 'Polar Star', Northrop low wing monoplane with a Wasp 60hp engine...
date: 30 July 2014 sourcing circumstances: circa operator: Flickr described at URL: https://www.flickr.com/photos/internetarchivebookimages/14759972226...
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