1. Toward improving the outcome of pregnancy: recommendations for the regional development of maternal and perinatal health services;Committee on Perinatal Health,1976
2. Toward improving the outcome of pregnancy: recommendations for the regional development of perinatal health services;Ryan;Obstet Gynecol,1975
3. Antenatal versus neonatal transport to a regional perinatal center: a comparison between matched pairs;Modanlou;Obstet Gynecol,1979
4. A review of perinatal mortality in Colorado, 1971 to 1978, and its relationship to the regionalization of perinatal services;Bowes;Am J Obstet Gynecol,1981
5. Very low–birth weight infant. I. Influence of place of birth on survival;Cordero;Am J Obstet Gynecol,1982