1. M. R. Anderberg: Cluster Analysis for Applications. Academic Press, New York 1973.
2. H. C. Andrews: Introduction to Mathematical Techniques in Pattern Recognition. Wiley-Interscience, New York 1972.
3. M. Bongard: Pattern Recognition. Spartan Books, New York-Washington 1970. ( Translated from Russian. )
4. R. O. Duda and P. E. Hart: Pattern Recognition and Scene Analysis. Wiley, New York 1973.
5. K. S. Fu: Pattern Recognition and Machine Learning. Proceedings of the Japan-U.S. Seminar on the Learning Process in Control Systems, Nagoya 1970. Plenum Press, New York-London 1971. ( This book stresses the common aspects of pattern recognition, systems identification and control. )