Columbia subject headings:
Baseball players--Legal status, laws, etc.--Japan.
Baseball players--Legal status, laws, etc.--United States.
Labor laws and legislation--Japan.
Labor laws and legislation--United States.
Labor mobility--Japan.
Labor mobility--United States.
Major League Baseball (Organization)
Nihon Yakyū Kikō.
Harvard subject headings:
Princeton subject headings:
Baseball--Law and legislation--Japan.
Baseball--Law and legislation--United States.
Labor mobility--Law and legislation.