1 "Ficheiro:On_the_pentacardioid_.._(IA_onpentacardioid00philrich).pdf".

Ficheiro:On the pentacardioid .. (IA onpentacardioid00philrich).pdf

sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:On_the_pentacardioid_.._(IA_onpentacardioid00philrich).pdf...