This image is a derivative work of the following images: File:Lichtsein_laag_geel.svg licensed with Cc-by-sa-2.5,2.0,1.0, Cc-by-sa-3.0-migrated, GFDL...
the 'stop' aspect. Date 13 June 2007 Source Own work Author Geert Wirken Other versions Derivative works of this file: Lichtsein laag geel knipper.svg...
