1. The ambulance. The story of emergency transportation of sick and wounded through the centuries;Barkley,1990
2. The formation of the emergency medical services system;Shah;Am J Public Health,2006
3. Toward improving the outcome of pregnancy: recommendations for the regional development of perinatal health services;Ryan;Obstet Gynecol,1975
4. Chapter 2: evolution in quality improvement in perinatal care in toward improving the outcome of pregnancy III: enhancing perinatal health through quality, safety and performance initiatives;Little,2010
5. Improved neonatal survival through maternal transport;Harris;Obstet Gynecol,1978