1.
Gravitational Million-Body Problem
by Heggie, Douglas C., Hut, Piet
ISBN: 9780521773034
List Price: $171.00
2.
Megalithic Science: Ancient Mathematics and Astronomy in Northwest Europe
by Heggie, Douglas C.
ISBN: 9780500050361
3.
Gravitational Million-Body Problem
by Hut, Piet, Heggie, Douglas
ISBN: 9780521774864
List Price: $86.00