1. An Introduction to the Use of the Stethoscope (facsimile edition by the Classics of Cardiology Library);Stokes;Edinburgh: Maclachlin and Stewart,1825
2. Perspectives in physiological monitoring;Geddes;Med Instrument,1976
3. The Principles and Practice of Medicine (facsimile by Classics of Medicine library);Osler,1892
4. Continuous noninvasive monitoring of respiratory rate in critically ill patients;Krieger;Chest,1986
5. Routine measurement of respiratory rate: An expensive tribute to tradition;Kory;JAMA,1957