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2. Placenta accreta 1949-1969;Fox;Obstet Gynecol Surv,1972
3. Placenta accreta, increta, and percreta: a survey of 40 cases;Breen;Obstet Gynecol,1977
4. Placenta previa accreta and prior cesarean section;Clark;Obstet Gynecol,1984
5. Placenta accreta: a problem of increasing clinical significance;Weckstein;Obstet Gynecol,1986