modification from existing icon. Intended for fair use.
The original uploader was <a href="https://en.wikipedia.org/wiki/User:BT14" class="extiw" title="wikipedia:User:BT14">BT14</a> at <a href="https://en.wikipedia.org/wiki/" class="extiw" title="wikipedia:">English Wikipedia</a>.
7 October 2011 (original upload date)
<span class="int-own-work" lang="">Own work by the original uploader</span>