Clark, Farewell to Alms, 259.

Там же, с. 245.

Gregory Clark, “The Indicted and the Wealthy: Surnames, Reproductive Success, Genetic Selection and Social Class in Pre-Industrial England,” Jan. 19, 2009,www.econ.ucdavis.edu/faculty/gclark/ Farewell%20to%20Alms/Clark%20-Surnames.pdf.