1. Roentgen pelvimetry and fetal cephalometry: A new technique;Ball;>Radiology,1935
2. Pelvicephalometry;Ball;>Radiology,1938
3. Roentgenographic obstetrical pelvicephalometry in the erect posture;Ball;>Amer. J. Roentgen.,1943
4. Roentgen pelvimetry and fetal cephalometry;Ball;>Surg. Gynec. Obstet.,1936
5. The advantage of X-ray diagnosis in pregnancy;Barter;>South. Med. J.,1953