Charles S. Peirce's sign icon png download
The structure of sign as described by Charles S. Peirce. I've also used pascallapalme's bubbles including <www.openclipart.org/people/pascallapalme/bulle1.svg>.
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Charles S. Peirce's sign free icon was designed by smok for icons Png and presented to its users.
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smok
12/28/2017
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