Article by Evelyn Barker, arguing that the principal aim of Aristotle's Organon was to reform the contemporary paedagogical role of dialectic. www.bu.edu/wcp/Papers/Anci/AnciBark.htm
Entry in the Catholic Encyclopaedia (1917), dominated by a historical survey from Indian and Pre-Aristotelian philosophy to the Logic of John Stuart Mill. www.newadvent.org/cathen/09324a.htm
Life and work of 13th century logician and author of the Tractatus; from the Stanford Encyclopedia by Joke Spruyt. plato.stanford.edu/entries/peter-spain
This site contains an online program for studying Aristotle's syllogistic logic. The theory of Aristotle's ancient logic is also presented. aristotelianlogic.glashoff.net
Explains the early introduction of notations used in logic and set theory as we know it today. Includes reference links to key people in this area. members.aol.com/jeff570/set.html