1. American Philosophical Society, AES, Am3, 575.06, circulars. Letter from Field Secretary, American Eugenics Association to Fair Associations asking education exhibit space.
2. Galton's law of ancestral heredity;Blumer;Heredity,1998
3. On a short method of least squares;Camp;Ann. of Math., 2nd Series,1922
4. Problems in sampling;Camp;J. Amer. Statist. Assoc.,1923