truetrue This image is a derivative work of the following images: File:Signal_B21e.svg licensed with Cc-by-sa-3.0,2.5,2.0,1.0, GFDL 2009-04-25T08:31:16Z Roulex
l'Ecologie, du Développement durable, et de l'Aménagement du Territoire. Author Roulex 45 Other versions Derivative works of this file: SignalC117b.svg