* Ashby, William Ross (1956/1964), ''An Introduction to Cybernetics'', Chapman and Hall, London, UK, 1956. Reprinted, Methuen and Company, London, UK, 1964. | * Ashby, William Ross (1956/1964), ''An Introduction to Cybernetics'', Chapman and Hall, London, UK, 1956. Reprinted, Methuen and Company, London, UK, 1964. |