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Portions of the above article were adapted from the following sources under the [[GNU Free Documentation License]], under other applicable licenses, or by permission of the copyright holders.

Portions of the above article were adapted from the following sources under the [[GNU Free Documentation License]], under other applicable licenses, or by permission of the copyright holders.

* [http://www.opencycle.net/wiki/Charles_Sanders_Peirce "Charles Sanders Peirce"], [http://www.opencycle.net/ OpenCycle]

* [http://www.opencycle.net/wiki/Charles_Sanders_Peirce "Charles Sanders Peirce"], [http://www.opencycle.net/ OpenCycle].

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     version: 15:22, 9 April 2007

     version: 15:22, 9 April 2007