History of Ringworld

	Revision 18 . . (edit) November 21, 2001 4:24 am by (logged).254.9.xxx [Fixup titles]
	Revision 17 . . (edit) November 12, 2001 6:07 pm by (logged).191.188.xxx
	Revision 12 . . October 2, 2001 7:19 pm by Ansible [added bit on stabilization and shadow squares]

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