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2. Bohr, Niels: 1913, ‘On the Constitution of Atoms and Molecules’, reprinted in Henry A. Boorse and Lloyd Motz (eds.), The World of the Atom, New York, 1966.
3. Carnap, Rudolf: 1950, Logical Foundation of Probability, Univ. of Chicago Press, Chicago (2nd ed., 1962 ).
4. Copi, Irving: 1978, Introduction to Logic, MacMillan, New York, 5th ed.
5. Cotes, Roger: 1713, Preface to the Second Edition of Newton’s Principia, in Isaac Newton, Principia, Vol. 1, Univ. of California Press, Berkeley, 1934.