A. Philip Randolph was a key figure in the history of Brotherhood of Sleeping Car Porters. But that was just one effort in a lifetime of activism for racial equality.
Research:

"A. Philip Randolph." Encyclopedia of World Biography Online, Gale, 1998. Gale In Context: U.S. History, link.gale.com/apps/doc/K1631005446/GPS?u=mlin_n_melpub&sid=bookmark-GPS&xid=a02165a4. Accessed 10 May 2023.
AFL-CIO. “A. Philip Randolph.” https://aflcio.org/about/history/labor-history-people/asa-philip-randolph
American Experience. “A. Philip Randolph.” From Marcus Garvey: Look for Me in the Whirlwind. https://www.pbs.org/wgbh/americanexperience/features/garvey-philip-randolph/
American Friends Service Committee. “Honoring A. Philip Randolph, a leader in the March on Washington.” 9/3/2020. https://afsc.org/news/honoring-philip-randolph-leader-march-washington
Bishop, M. (2017, June 11). Lucille Campbell Green Randolph (1883-1963). BlackPast.org. https://www.blackpast.org/african-american-history/randolph-lucille-campbell-green-1883-1963/
Bracey, John H. Jr. and “August Meier. “Allies or Adversaries?: The NAACP, A. Philip Randolph and the 1941 March on Washington.” The Georgia Historical Quarterly , Spring 1991, Vol. 75, No. 1. https://www.jstor.org/stable/40582270
Britannica, The Editors of Encyclopaedia. "A. Philip Randolph". Encyclopedia Britannica, 12 May. 2023, https://www.britannica.com/biography/A-Philip-Randolph. Accessed 12 May 2023.
Bynum, Cornelius. “A Philip Randolph and the Struggle for Civil Rights.” University of Illinois Press. 2010.
Green, James R. “A. Philip Randolph and Boston's African-American Railroad Worker.” Trotter Review. Vol. 6, Issue 2. 9/21/1992. http://scholarworks.umb.edu/trotter_review
Hill, Norman. "A. Philip Randolph. (Labor)." Social Policy, vol. 32, no. 4, summer 2002, pp. 9+. Gale General OneFile, link.gale.com/apps/doc/A90747203/GPS?u=mlin_n_melpub&sid=bookmark-GPS&xid=f45caf0e. Accessed 10 May 2023.
Marable, Manning. “A. Philip Randolph and the Foundations of Black American Socialism.” From Workers' Struggles, Past and Present, edited by James Green. Temple University Press.
Prescod, Paul. “You Should Know More About A. Philip Randolph, One of America’s Greatest Socialists.” Jacobin. 5/23/2020. https://jacobin.com/2020/05/a-philip-randolph-socialist-civil-rights-march-bscp
"Randolph, A. Philip." Development of the Industrial U.S. Reference Library, edited by Sonia G. Benson, et al., vol. 2: Biographies, UXL, 2006, pp. 182-192. Gale In Context: U.S. History, link.gale.com/apps/doc/CX3442000053/GPS?u=mlin_n_melpub&sid=bookmark-GPS&xid=643ce2c8. Accessed 10 May 2023.
Randolph, A. Philip, "Letter from A. Philip Randolph, International President of the Brotherhood of Sleeping Car Porters to Fiorello La Guardia, Mayor of New York City," 5 June 1941. Courtesy of National Archives. https://iowaculture.gov/history/education/educator-resources/primary-source-sets/protest-america/letter-philip-randolph-to
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