Kome Sodo Zengo No Buraku to Kyoiku by Zenkoku Kaiho Kenkyukai (4180342065 9784180342068 4-18-034206-5)
Zenkoku Suiheisha to Kyoiku Sabetsu Kyudan Toso by Zenkoku Kaiho Kyoiku Kenkyukai (4180343002 9784180343003 4-18-034300-2)
