1. Day, M. E., Perceptual and Motor Skills, 19, 443 (1964).
2. Day, M. E., Psychotherapy, 5, 146 (1968).
3. Bakan, P., Perceptual and Motor Skills, 28, 927 (1969).
4. London, P., Hart, J. T., and Leibovitz, M. P., Nature, 219, 71 (1968).
5. Nowlis, D. P., and Rhead, J. C., Perceptual and Motor Skills, 27, 1047 (1968).