Eastlock, Helen M.. Helen Eastlock to Eleanor Roosevelt, April 11, 1939. ProQuest History Vault. https://congressional.proquest.com/histvault?q=001398-010-0938.
Delano, Jack. “At the bus station in Durham, North Carolina,” 1940. Library of Congress Prints and Photographs Division Washington, DC 20540. http://www.loc.gov/pictures/item/2017747598/
Gabel, Hortense W.. Hortense Gabel to Marian Wynn Perry, July, 8 1949. ProQuest History Vault. https://congressional.proquest.com/histvault?q=001398-010-0938.
Herron, Matt. “Selma-to-Montgomery March for Voting Rights, 1965,” 1965. Princeton Alumni Weekly. https://paw.princeton.edu/article/mississippi-eyes
Johnson, Lydon B.. Phone call with Martin Luther King Jr.. July 7, 1965. http://www.lbjf.org/aud/tel-wh/187903-aud-tel-wh-08312.mp3
Riis, Jacob, “Baxter St. Alley,” February 12, 1888, International Center of Photography. https://www.icp.org/browse/archive/objects/baxter-st-alley
“Forty-Millionaire Carnegie in his Great Double Role,” The Saturday Globe, 9 July 1892. HERB: Resources for Teachers. http://herb.ashp.cuny.edu/items/shoe/636
“July 27, 1877 (Page 1 of 8).” Philadelphia Inquirer (1860-1934), Jul 27, 1877. ProQuest History Vault. https://envoy.dickinson.edu/login?url=https://search.proquest.com/docview/1825939459?accountid=10506.
“Policeman Observing Charred Rubble and Corpses,” March 11, 1911. Hulton Archive/Getty Images. https://www.gettyimages.com/detail/news-photo/policeman-stands-in-the-street-observing-charred-rubble-and-news-photo/3112343
“Group of Indian Boys,” June 6, 1899. Dickinson College Archives & Special Collections. http://carlisleindian.dickinson.edu/images/group-indian-boys-1899
Bronstein, Jamie L. Two Nations, Indivisible: A History of Inequality in America. Westport: ABC-CLIO, LLC, 2016. http://ebookcentral.proquest.com/lib/dickinson/detail.action?docID=4694054.
Caliendo, Stephen M. Inequality in America : Race, Poverty, and Fulfilling Democracy’s Promise. New York: Westview Press, 2014. https://search.ebscohost.com/login.aspx?direct=true&db=nlebk&AN=828327&site=eds-live&scope=site.
Chassagnon, Virgile and Guillaume Vallet. “Albion W. Small’s Neglected Progressive Views: Reducing Inequalities for a Reasonable Capitalism.” Journal of the History of Economic Thought (Cambridge University Press) 41, no. 1 (2019): 77-98. doi:10.1017/S1053837217000694. https://search.ebscohost.com/login.aspx?direct=true&db=bth&AN=135430241&site=eds-live&scope=site.
Diner, Hasia. “The Encounter between Jews and America in the Gilded Age and Progressive Era.” Journal of the Gilded Age & Progressive Era 11, no. 1 (2012): 3-25. doi:10.1017/S1537781411000442. http://search.ebscohost.com/login.aspx?direct=true&db=31h&AN=77667651&site=ehost-live&scope=site.
Fink, Leon. Major Problems in the Gilded Age and the Progressive Era . 2nd ed. Boston, MA: Houghton Mifflin Company, 2001.
Foner, Eric. Give Me Liberty!: An American History. 5th ed. New York, NY: W. W. Norton & Company, 2016.
Lawson, Steven F. Civil Rights Crossroads : Nation, Community, and the Black Freedom Struggle. Lexington: The University Press of Kentucky, 2015. https://search.ebscohost.com/login.aspx?direct=true&db=cat05549a&AN=palci.ocn900344805&site=eds-live&scope=site.