Mark J. Perry, “Thanks to Technology, Americans Spend Dramatically less on Food Than They Did 3 Decades Ago”, AEI Ideas, 7 апреля 2013 г., http://www.aei-ideas.org/2013/04/technology-innovation-and-automation-have-lowered-the-cost-ofour-food-and-improved-the-lives-of-all-americans/.
