Columbia subject headings:
Higashi Nihon Ryokaku Tetsudō Rōdō Kumiai--History--20th century.
Labor movement--Japan--History--20th century.
Matsuzaki, Akira, 1936-2010.
Nihon Kakumeiteki Kyōsan Shugisha Dōmei. Kakumeiteki Marukusu Shugiha--History--20th century.
Tetsudō Rōren--History--20th century.
Harvard subject headings:
Labor unions and communism--Japan
Matsuzaki, Akira, 1936-2010
Tetsudō Rōren--History.
Princeton subject headings: