Reference Sources: 
D. Smith, M. Schenk, A Dissection Guide & Atlas to the Fetal Pig
F. Bohensky, Photo Manual and Dissection Guide of the Fetal Pig: With Sheep Heart, Brain, Eye
T. Martin, Human Anatomy and Physiology Laboratory Manual, Fetal Pig Dissection
W. Walker, Anatomy And Dissection Of The Fetal Pig