"David Starr Jordan '72"(PDF). Cornell Alumni News. I (6): 39, 43. May 10, 1899. Diarsipkan(PDF) dari versi aslinya tanggal February 12, 2019. Diakses tanggal June 15, 2014.
David Starr Jordan The Blood of the Nation: A Study of the Decay of Races through the Survival of the Unfit. (copyright 1902, reprinted 1910) p 12Diarsipkan October 30, 2020, di Wayback Machine.. The term "race" occurs more than 30 times in the short book. The term "eugenics" is not in there, but the basic concept is described.
"David Starr Jordan '72"(PDF). Cornell Alumni News. I (6): 39, 43. May 10, 1899. Diarsipkan(PDF) dari versi aslinya tanggal February 12, 2019. Diakses tanggal June 15, 2014.
David Starr Jordan The Blood of the Nation: A Study of the Decay of Races through the Survival of the Unfit. (copyright 1902, reprinted 1910) p 12Diarsipkan October 30, 2020, di Wayback Machine.. The term "race" occurs more than 30 times in the short book. The term "eugenics" is not in there, but the basic concept is described.