1 Gilbert Farrar, Typography of Advertisements That Pay (New York: D. Appleton and Company, 1917), epigraph.
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5 Jessica Semega, et al., “Income and Poverty in the United States: 2018,” U.S. Census Bureau (2019), accessed April 17, 2020, 1, https://www.census.gov/content/dam/Census/library/publications/2019/demo/p60-266.pdf.