This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Pictogramsnpsmiscsmoking.svg pictograms used by the United States National Park Service package containing all NPS symbols is available at the sourceforge net Open Icon Library nps gov htm Converted from PDF to SVG for the sourceforge net Open Icon Library Originally created July converted Jan NPS Graphics converted by User