Title: Hakugeki Daigo Daitai dokugasusen kankei shiryō
Subjects: Sino-Japanese War, 1937-1945, Sources, Chemical warfare, World War, 1939-1945, Asphyxiating and poisonous Gases, War use, History, Research, Taiheiyō sensō, Dokugasu
Places: Japan
Time periods: 20th century