Bernhard Siegfried Albinus, Tables of the skeleton and muscles of the human body 18c. (http://exhibits.hsl.virginia.edu/treasures/bernhard-siegfried-albinus-1697-1770/) and The Knee Joint by Henry Gray (1825–1861). Anatomy of the Human Body. 1918.(http://www.bartleby.com/107/93.html#i345)