1. Bell WE (1977) Perinatal trauma to the head. In: Schaffer AJ Avery ME: Diseases of the newborn, 4th edn. WB Saunders, Philadelphia
2. Caffey J (1972) Pediatric X-ray diagnosis, 6th edn, Vol 1. Year Book Medical Publishers, Chicago
3. Crosby WM (1979) Automobile injuries and blunt abdominal trauma. In: Buchsbaum HJ: Trauma and pregnancy. WB Saunders, Philadelphia
4. McNeil JP (1964) In: Parkinson EB: Prenatal loss due to external trauma to the uterus. Am J Obstet Gynecol 90:30
5. Scanlon JW, Nelson T, Grylack LJ, Smith YF (1979) A system of newborn physical examination. University Park Press, Baltimore