circa 2000
(1) "Twin
Compasses" (Randy Wang, Computer Science Dept., Princeton
U.) (1999)
(2) Wanda McGee, with illustrations by Cindy Mueller,
Invisible Currents: Natures Lessons for the Mind and Heart
(Alexandria, VA: Miles River, 2000):
(3) Andy Goldsworthy, "Sand
brought to an edge to catch the morning light, Mount Victor
Station, South Australia, 17-18 July 1991"
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