Aquifer (vectorized)
<a href="//commons.wikimedia.org/wiki/User:Biopics" title="User:Biopics">Hans Hillewaert</a> derivative work: <a href="//commons.wikimedia.org/wiki/User:Bramfab" title="User:Bramfab">Bramfab</a>
2009-03-17
<a href="//commons.wikimedia.org/wiki/File:Aquifer_en.svg" title="File:Aquifer en.svg">File:Aquifer en.svg</a>