This image is a derivative work of the following images: File:Cognitive_science_heptagram.svg licensed with PD-self 2010-02-22T20:29:42Z Beao 1578x1809 (152026...
== {{PD-self}} Copied from [[[w:en:Image:Psi2.svg|here]]] on the english wikipedia. File:Heptagrams.svg licensed with PD-ineligible 2006-05-23T06:26:14Z...
