1. Cesarean section mortality in Rhode Island;Evrand;Obstet. Gynecol,1977
2. Cesarean section rates: Time trends and comparisons among hospital sizes,1975
3. C-section increase linked to fetal outcome;Everston;Ob. Gyn. Observ,1977
4. Increasing cesarean section rate;Johnell;Acta Obstet. Gynecol. Scand,1976