Metallurgy expansion area on Bronze Age (labels in Spanish).
<ul><li><a href="//commons.wikimedia.org/wiki/File:Metallurgical_diffusion.svg" title="File:Metallurgical diffusion.svg">Metallurgical diffusion.svg</a>: <a href="//commons.wikimedia.org/wiki/User:Want" title="User:Want">Want</a></li>
<li>derivative work: <a href="//commons.wikimedia.org/wiki/User:Rowanwindwhistler" title="User:Rowanwindwhistler">Rowanwindwhistler</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Rowanwindwhistler" title="User talk:Rowanwindwhistler">talk</a>)</li></ul>
CC BY-SA 4.0
<a href="//commons.wikimedia.org/wiki/File:Metallurgical_diffusion.svg" title="File:Metallurgical diffusion.svg">Metallurgical diffusion.svg</a>