github.com/apremalal/vamps-core@v1.0.1-0.20161221121535-d430b56ec174/server/webapps/app/base/img/flags/readme.txt (about)

     1  Flag icons - http://www.famfamfam.com
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     3  These icons are public domain, and as such are free for any use (attribution appreciated but not required).
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     5  Note that these flags are named using the ISO3166-1 alpha-2 country codes where appropriate. A list of codes can be found at http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2
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     7  If you find these icons useful, please donate via paypal to mjames@gmail.com (or click the donate button available at http://www.famfamfam.com/lab/icons/silk)
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     9  Contact: mjames@gmail.com