Charles Sanders Peirce (September, 10, 1839 – April 19, 1914)

On a New List of Categories, by Charles S. Peirce Proceedings of the American Academy of Arts and Sciences 7 (1868), 287-298.

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Stanford Encylopedia of Philosophy

Pragmatism as a Principle and Method of Right Thinking. The 1903 Hardvard Lectures on Pragmatism. Charles Sanders Peirce. Edited by Patricia Ann Turrisi, 1997

The Essential Peirce. Selected Philosophical Writings. Volume 2. (1983-1913) Edited by the Peirce Edition Project.

Philosophical Writings of Peirce. Selected and Edited with an introduction by Justus Buchler, 1955