5003158733
heptagons (300378913) 'is basis of' heptagonal (300378916);
changeNote
5003158733
heptagons (300378913) 'is basis of' heptagonal (300378916);
description
heptagons (300378913) 'is basis of' heptagonal (300378916);
type
relation added
startedAtTime
2012-02-13T16:15:20