History of the Peloponnesian War
After the Peloponnesian War - Thirty Tyrants Repla, Ancient Greece: The Pelopponesian War, Histories, HWC, The Peloponnesian War, Peloponnesian War, Peloponnesian War Timeline [About.com]
Sources for Thucydides [Perseus]
Four essays on Thucydides, by Cornford, Crane, Finley, and Hobbes, plus a translation of Thucydides' Peloponnesian War.
Thucydides as Science
Essay by Russell McNeil concerning Thucydides' contribution to social science.