Kansas City Royals Negro League Uniform — UNISWAG
History of the Negro Leagues in KC, Part One - Royals Review
Ranking the best Royals jerseys - Royals Review
SABR Century: 1921 Negro National League – Society for American Baseball Research
Gentle Black Giants: A History of Negro Leaguers in Japan: Staples Jr., Bill, Sayama, Kazuo, Ashwill, Gary, Nakagawa, Kerry Yo, Shimizu, Shimako, Nakamura, George, Zenimura, Howard Kenso, Yoshida, Kyoko, Pearce, Ralph M.
Undeniable: Negro Leagues Women, 02/01/2023
Royals Rumblings - News for October 23, 2023 - Royals Review
Royals Rumblings - News for June 26, 2023 - Royals Review
Bo Jackson: Man, Myth, Royal, and 1989 – The Royals Reporter
Negro League innovations adopted by MLB
Native American Baseball Players, Part II - Royals Review
Used Book in Good Condition
Complete Book of Baseball's Negro Leagues