Columbia subject headings:
Harvard subject headings:
Asphyxiating and poisonous gases--Japan--War use--Congresses.
Biological warfare--Japan--Congresses.
Sino-Japanese War, 1937-1945--Atrocities--Congresses
Princeton subject headings:
Asphyxiating and poisonous gases--Japan--War use--Congresses.
Biological warfare--Japan--Congresses.
Sino-Japanese War, 1937-1945--Atrocities--Congresses.