1. The effects of bolus normal saline instillation in conjunction with endotracheal suctioning;Gray;Respir Care,1990
2. Methods in critical are. The AACN manual;Millar,1985
3. Critical care;Burrell,1982
4. Comprehensive respritory care, physiology and technique;Wade,1982
5. Intensive and rehabilitative respiratory care;Petty,1982