REFERENCES
- Kass, I. and Shebts, P.: Emphysema—a new approach to an old disease. Bull Nat Tuberc Resp Dis Ass 55: 14–16 (May) 1969.
- American Thoracic Society Committee on Diagnostic Standards for Non-Tuberculous Respiratory Diseases: Statement on definitions and classification of chronic bronchitis, asthma and pulmonary emphysema. Reprinted from Amer Rev Resp Dis 85: 762–768 (May) 1962.
- National Academy of Sciences—National Research Council: Drug efficacy study. Personal communication, September 1969.
- Harris, R. L. and Riley, H. D., Jr.: Reactions to aerosol medication in infants and children. JAMA 201: 953–955 (September 18) 1967.
- Jacobsen, E.: Progressive Relaxation. Chicago, University of Chicago Press, 1949, PP 40–80.