Full text available for a fee. (The paper was first presented in March 1950 at the National Institute for Radio Engineers Convention in New York.)See also: summary slidesPhilosophical Magazine (Series 7) 41:256-275

See also:Full Text (scanned)Google BooksTech. rep., National Physical Laboratory. (Reprinted in Meltzer, Bernard and Donald Michie (Eds.), Machine Intelligence 5. Edinburgh University Press. (Also in Ince, 1992)

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