Columbia subject headings:
African American baseball players.
Baseball--Canada--History.
Baseball--United States--History.
Discrimination in sports--Canada.
Discrimination in sports--United States.
Negro leagues.
Harvard subject headings:
African American baseball players--Pictorial works.
Negro American League.
Negro leagues--History
Negro leagues--Pictorial works.
Princeton subject headings:
African American baseball players--United States--History.
Baseball--United States--History.
Negro leagues--History.