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Suggested Reading

"Blood Basics." American Society of Hematology, 17 Jan. 2018,

Buettner-Janusch, John. "Natural Selection in Man. The ABO (H) Blood Group System." American Anthropologist, vol. 51, 1959, pp. 437–56.

Kienle, Alwin, et al. "Why Do Veins Appear Blue? A New Look at an Old Question." Applied Optics, vol. 35, no. 7, 1996, pp. 1151–60.