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Benford, Gregory,
--Foundation's Fear, HarperPrism, New York, 1997. ISBN: 0-06-105243-4
Bear, Greg,
--Foundation and Chaos, HarperPrism, New York, 1998. ISBN: 0-06-105242-6
Brin, David,
--Foundation's Triumph, HarperPrism, New York, 1999. ISBN: 0-06-105241-8
Web Site:
FOUNDATION'S FEAR
FOUNDATION & CHAOS
FOUNDATION'S TRIUMPH