Kokusai Jōsei Kenkyūkai (Japan)

• Chūkyō kara no chokusetsu shinryaku no kanōsei ni tsuite
• Chūkyō naigai seisaku no kihon hōshin
• Chūkyō no gaikō seisaku no dōkō
• Shōwa 40-nendo tōshin jikō ichiranhyō