1. Clinical signs associated with the amount of tracheobronchial secretions;Amborn;Nursing Research,1976
2. Maximal static respiratory pressures in generalized neuromuscular disease;Black;Amer. Rev. Resp. Dis.,1971
3. Respiratory Insufficiency;Burrows,1975
4. Respiration in Health and Disease;Cherniack,1972
5. Minimizing the harmful effects of mechanical aspiration;Demers;Heart and Lung,1973