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[[File:Billiard-var.gif]] | [[File:Billiard-var.gif]] | ||
The following is Bill Burney's excellent essay on on the Billiard shape, which | The following is Bill Burney's excellent essay on on the Billiard shape, which he wrote for A.S.P.[http://aspipes.org/index.php?option=com_content&view=article&id=31:the-billiard&catid=21:essays&Itemid=147] and is used here by permission: | ||
==The Billiard== | ==The Billiard== |