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- Agrippa
- Historians in Chronological Order
- Historians in Chronological Order
- Aristotle's Works, User Commentaries, and Internet Resources
- Aristotle Biographical Information and Resourses
- Aristotle's Categories with User Commentary by Section
- Aristotle Categories Section One, Part One
- Aristotle's Categories Section One, Part Two
- Aristotle's Categories Section One, Part Three
- Aristotle's Categories Section One, Part Four
- Aristotle's Categories Section One, Part Five
- Aristotle's Categories Section One, Part Six
- Aristotle's Categories Section Two, Part Seven
- Aristotle's Categories Section Two, Part Eight
- Aristotle's Categories Section Three, Part Nine
- Aristotle's Categories Section Three, Part Ten
- Aristotle's Categories Section Three, Part Eleven
- Aristotle's Categories Section Three, Part Twelve
- Aristotle's Categories Section Three, Part Thirteen
- Aristotle's Categories Section Three, Part Fourteen
- Aristotle's Categories Section Three, Part Fifteen
- Porphyry's Isagoge: Introduction to the Logical Categories of Aristotle
- Porphyry Biographical Information and Resourses
- Porphyry's Isagoge: Introduction to the Logical Categories of Aristotle
- Porphyry's Isagoge: Object of the Writer, in the Present Introduction
- Porphyry's Isagoge: Of the Nature of Genus and Species
- Porphyry's Isagoge: Of Difference
- Porphyry's Isagoge: Of Property
- Porphyry's Isagoge: Of Accident
- Porphyry's Isagoge: Of Things Common and Peculiar to the Five Predicates
- Porphyry's Isagoge: Of the Community and Distinction of Genus and Difference
- Porphyry's Isagoge: Of Community and Difference of Genus and Species
- Porphyry's Isagoge: Of Community and Difference of Genus and Property
- Porphyry's Isagoge: Of Community and Difference of Genus and Accident
- Porphyry's Isagoge: Of Community and Difference of Species and Difference
- Porphyry's Isagoge: The Same Subject Continued
- Porphyry's Isagoge: Of Community and Difference of Property and Difference
- Porphyry's Isagoge: Of Community and Difference of Accident and Difference
- Porphyry's Isagoge: Of Community and Difference of Species and Property
- Porphyry's Isagoge: Of Community and Difference of Species and Accident
- Porphyry's Isagoge: Of Community and Difference of Property and Accident