Stewart, John Q., "Demographic Gravitation: Evidence and Applications", Sociometry, Vol. 11, No. 1/2. (February – May, 1948), pp. 31–58.[1]
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Vecchia, Karla J., John Q. Stewart Papers (C0571)1907–1970s
A Finding Aid, Manuscripts Division
Department of Rare Books and Special Collections
Princeton University Library
2004 "John Q. Stewart Papers". Archived from the original on 2007-06-10. Retrieved 2007-10-22.
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Vecchia, Karla J., John Q. Stewart Papers (C0571)1907–1970s
A Finding Aid, Manuscripts Division
Department of Rare Books and Special Collections
Princeton University Library
2004 "John Q. Stewart Papers". Archived from the original on 2007-06-10. Retrieved 2007-10-22.