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On Leibniz's lifelong interest in the characteristica and the like, see the following texts in Loemker (1969): 165–66, 192–95, 221–28, 248–50, and 654–66. On the characteristica, see Rutherford (1995) and the still-classic discussion in Couturat (1901: chpts. 3,4). Also relevant to the characteristica is Mates's (1986: 183–88) discussion of what he called the lingua philosophica.
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Rudolf Carnap, 1958. Introduction to Symbolic Logic with Applications. Dover.
—, 1967. The Logical Structure of the World: Pseudoproblems in Philosophy. University of California Press. Translation of his 1928 Der Logische Aufbau der Welt. Leipzig: Felix Meiner Verlag.
Cevolatti, D., and Maud, S., 2004, "Realising the Enlightenment: H. T. Odum's Energy Systems Language qua G. W. v. Leibniz's Characteristica Universalis", Ecological Modelling 178: 279–92.
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Louis Couturat, 1901. La Logique de Leibniz. Paris: Felix Alcan. Donald Rutherford's English translation in progress.
Louis Couturat, O. Jespersen, R. Lorenz, Wilhelm Ostwald and L.Pfaundler 1910, International Language and Science: Considerations on the Introduction of an International Language into Science", Constable and Company Limited, London.
Dascal, M., 1987. Leibniz: Language, Signs and Thought, A Collection of Essays. Philadelphia: John Benjamins.
Martin Davis, 2001. Engines of Logic: Mathematicians and the Origin of the Computer. W W Norton.
Dawson, J. W. Jr., 1997. Logical Dilemmas: The Life and Work of Kurt Gödel. Wellesley MA: A. K. Peters.
Fearnley-Sander, Desmond, 1982, "Hermann Grassmann and the Prehistory of Universal Algebra," The American Mathematical Monthly 89: 161–66.
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Clarence Irving Lewis, 1960 (1918). A Survey of Symbolic Logic. Dover.
Loemker, Leroy, ed. and trans., 1969. Leibniz: Philosophical Papers and Letters. Synthese Historical Library. Dordrecht: D. Reidel.
Mates, Benson, 1986. The Philosophy of Leibniz. Oxford Univ. Press.
Odum, E.C., Odum, H.T. and Peterson, N.S., 1995, "Using Simulation to Introduce the Systems Approach in Education" in Hall, C.S., ed., Maximum Power: The Ideas and Applications of H. T. Odum. Colorado Univ. Press: 346–52.
Parkinson, G. H. R., ed. and trans., 1966. Leibniz: Logical Papers. Oxford Univ. Press.
—, and Mary Morris, trans., 1973. Leibniz: Philosophical Writings. London: J M Dent.
Piper, R. F. 1957, "Review of 'Unified Symbolism for World Understanding in Science' by Oliver L. Reiser," Philosophy and Phenomenological Research 17: 432–33.
Reiser, Oliver Leslie 1946. A philosophy for world unification;: Scientific humanismas an ideology for cultural integration, Haldeman-Julius Publications.
—, 1940. The Promise of Scientific Humanism Toward a Unification of Scientific, Religious, Social and Economic Thought, Oskar Piest.
–, 1955. Unified symbolism for world understanding in science: Including Bliss symbols (semantography) and logic, cybernetics and semantics, Semantography Pub. Co.
Nicholas Rescher, 1954, "Review of On the Project of a Universal Character by Jonathan Cohen," Journal of Symbolic Logic 19: 133.
Hartley Rogers, Jr., 1963, "An Example in Mathematical Logic," The American Mathematical Monthly 70: 929–45.
Rutherford, Donald, 1995, "Philosophy and language" in Jolley, N., ed., The Cambridge Companion to Leibniz. Cambridge Univ. Press.
Patrick Suppes, 1999 (1957). Introduction to Logic. Dover.
Jean van Heijenoort, 1967, "Logic as calculus and logic as language," Synthese 17: 324–330. Reprinted in Hintikka (1997).
Wiener, Philip P., 1940, "Leibniz's Project of a Public Exhibition of Scientific Inventions," Journal of the History of Ideas 1: 232–240.
Woodger, Joseph H., 1937, The axiomatic method in biology, Cambridge University Press.
Yen, D.C., Huang, S.-M., Ku, C.-Y. 2002, The impact and implementation of XML on business-to-business commerce, Computer Standards and Interfaces 24: 347–62.