This image is a derivative work of the following images: File:SolresolFarbenecritures.png licensed with Cc-by-sa-3.0-migrated, GFDL 2005-06-23T13:52:12Z
symbols. Vector version of File:SolresolFarbenecritures.png by Égoïté, in turn a derivatve (ti to si) of File:SolresolFarben.png by Immanuel Giel. Date 6 August