Hitoshi Koyama

1931

• Kūshū to dōin
• Beigun shiryō Nihon kūshū no zen'yō
• Gashū Ōsaka daikūshū no kiroku
• Nihon shakai undō shisō shiron
• Ōsaka-fu no hyakunen
• Ōsaka-fu no Manshū imin
• Ōsaka daikūshū
• Senzen Shōwa-ki Ōsaka no kōgai mondai shiryō
• Taiheiyō sensōka no bōkū shiryō
• Taishōki no kenryoku to minshū
• 戦争差别公害
• 戦前昭和期大阪の公害問題資料