Peirce, C. S. (manuscript winter of 1880–81), "A Boolean Algebra with One Constant", published 1933 in Collected Papers v. 4, paragraphs 12–20. Reprinted 1989 in Writings of Charles S. Peirce v. 4, pp. 218-21, Google Preview (页面存档备份,存于互联网档案馆). See Roberts, Don D. (2009), The Existential Graphs of Charles S. Peirce, p. 131.
Peirce, C. S. (manuscript winter of 1880–81), "A Boolean Algebra with One Constant", published 1933 in Collected Papers v. 4, paragraphs 12–20. Reprinted 1989 in Writings of Charles S. Peirce v. 4, pp. 218-21, Google Preview (页面存档备份,存于互联网档案馆). See Roberts, Don D. (2009), The Existential Graphs of Charles S. Peirce, p. 131.