Reagent of sulfur.  Possession of <a href="//commons.wikimedia.org/wiki/User:Vineyard" title="User:Vineyard">Vineyard</a>   Oct. 25, 2005
No machine-readable author provided. <a href="//commons.wikimedia.org/wiki/User:Vineyard" title="User:Vineyard">Vineyard</a> assumed (based on copyright claims).
CC BY 3.0
No machine-readable source provided. Own work assumed (based on copyright claims).