The Great Brain Debate: Nature or Nurture?

[1]  G. L. Walls.  The problem of visual direction, Part II. The tangible basis for nativism. , 1951, American Journal of Optometry and Archives of American Academy of Optometry.

[2]  G. L. Walls.  The problem of visual direction, Part I. The history to 1900. , 1951, American journal of optometry and archives of American Academy of Optometry.