Lateral system a mark
<ul><li><a href="//commons.wikimedia.org/wiki/File:Lateral_system_a_mark.PNG" title="File:Lateral system a mark.PNG">Lateral_system_a_mark.PNG</a>: Mark.murphy</li>
<li>derivative work: <a href="//commons.wikimedia.org/wiki/User:Rehua" title="User:Rehua">Rehua</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Rehua" title="User talk:Rehua"><span class="signature-talk">talk</span></a>)</li></ul>
This file was derived from: <a href="//commons.wikimedia.org/wiki/File:Lateral_system_a_mark.PNG" title="File:Lateral system a mark.PNG">Lateral system a mark.PNG</a>: <a href="//commons.wikimedia.org/wiki/File:Lateral_system_a_mark.PNG" class="image"><img alt="Lateral system a mark.PNG" src="https://upload.wikimedia.org/wikipedia/commons/thumb/e/e5/Lateral_system_a_mark.PNG/50px-Lateral_system_a_mark.PNG" decoding="async" width="50" height="10" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/e/e5/Lateral_system_a_mark.PNG/75px-Lateral_system_a_mark.PNG 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/e/e5/Lateral_system_a_mark.PNG/100px-Lateral_system_a_mark.PNG 2x" data-file-width="512" data-file-height="103"></a><br>