Friday, 20 July 2012

carved balls

http://www.georgehart.com/virtual-polyhedra/neolithic.html

http://www.ianbeggarchitect.co.uk/phdi/p1.nsf/supppages/1430?opendocument&part=3

http://www.neverendingbooks.org/index.php/scottish-solids-final-comments.html
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