1. The bundle of life;Murray;Ancient Egypt,1930
2. The placenta in lore and legend;Long;Bull Med Libr Assoc,1963
3. Loke YW. Life's vital link: the astonishing role of the placenta, 1st ed. Oxford, UK: Oxford University Press; 2013.
4. International Research Center for Japanese Studies. Noma Collection (Western Medical History Books). Kyoto, Japan: 2002. Available at: http://shinku.nichibun.ac.jp/NOMA/new/. Accessed Aug. 14, 2015.
5. The placenta in toxemia of pregnancy;Tenney;Am J Obstet Gynecol,1940