<i>Open Access Button</i> Logo. <a rel="nofollow" class="external text" href="https://openaccessbutton.org/">openaccessbutton.org</a>
<a href="//commons.wikimedia.org/wiki/User:Maklaan" title="User:Maklaan">User:Maklaan</a>
2015-01-25
<p><span class="int-own-work" lang="en">Own work</span>
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<ul><li><a rel="nofollow" class="external text" href="https://www.flickr.com/photos/128805157@N06/15564891821/">The official logo</a> by <i>Open Access Button</i> under <a rel="nofollow" class="external text" href="https://creativecommons.org/licenses/by/2.0/">CC-BY-2.0</a></li></ul>