References
- Marsland D. W., Wood M., Mayo S. A data bank for patient care, curriculum and research in family practice: 526, 196 patient problems. Journal of Family Practice 1976; 3(1)23–68
- Norman E. C., Garett I. M., Schaefer J. The human learning system. Technological Horizons in Education 1981; 8(2)47–48