Columbia subject headings:
Plessy, Homer Adolph--Trials, litigation, etc.
Segregation in transportation--Law and legislation--Louisiana--History.
Segregation--Law and legislation--United States--History.
United States--Race relations--History.
Harvard subject headings:
Plessy, Homer Adolph--Trials, litigation, etc.
Segregation in transportation--Law and legislation--Louisiana--History.
Segregation--Law and legislation--United States--History.
United States--Race relations--History.
Princeton subject headings:
Plessy, Homer Adolph--Trials, litigation, etc.
Segregation in transportation--Law and legislation--Louisiana--History.
Segregation--Law and legislation--United States--History.
United States--Race relations--History.