GUTHRIE, W.K.C. A history of Greek Philosophy. Vol. 1,2,4-6. (1978-90). 5 (of 6) vols. Owrps. (Spines discold.). -- Id. The Sophists. (1977). Owrps. -- M.C. NUSSBAUM. The fragility of goodness. Luck and ethics in Greek tragedy and philosophy. (1989). Owrps. -- S.M. COHEN, (a.o.), ed. Readings in Ancient Greek Philosophy from Thales to Aristotle. 2nd ed. (2000). Owrps. -- W. KAUFMANN. Tragedy and Philosophy. (1992). Owrps. -- And 4 o. (13).