Template:Ref-Fawcett1905
From Embryology
Fawcett E. The circle of Willis - An examination of 700 specimens. (1905) J Anat. Physiol. 40(1): 63.2–70.
Fawcett E. The circle of Willis - An examination of 700 specimens. (1905) J Anat. Physiol. 40(1): 63.2–70.