Changes

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* Newell, A.,

* Newell, A., ''Unified Theories of Cognition'', Harvard University Press, Cambridge, MA, 1990.

  'Unified Theories of Cognition',

    Harvard University Press, Cambridge, MA, 1990.

* Nicolis, G. & Prigogine, I.

* Nicolis, G., and Prigogine, I., ''Exploring Complexity : An Introduction'', W.H. Freeman, New York, NY, 1989.

  'Exploring Complexity: An Introduction',

    W.H. Freeman, New York, NY, 1989.

* Nijenhuis, A. & Wilf, H.S.,

* Nijenhuis, A., and Wilf, H.S., ''Combinatorial Algorithms : For Computers and Calculators'', 2nd edition, Academic Press, New York, NY, 1978.

  'Combinatorial Algorithms: For Computers and Calculators',

    2nd edition, Academic Press, New York, NY, 1978.

* Nilsson, N.J.,

* Nilsson, N.J., ''Principles of Artificial Intelligence'', Tioga Publishing, Palo Alto, CA, 1980.

  'Principles of Artificial Intelligence',

    Tioga Publishing, Palo Alto, CA, 1980.

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