Search for: Title Author Subject Series that begins with: 10 20 30 50 100 per page < Previous 10 Headings Next 10 Headings > Browse Headings # Chemical warfare 4 SEE ALSO narrower term: Gases, Asphyxiating and poisonous -- War use 1 Chemical warfare agents -- SEE: Chemical agents (Munitions) 2 Chemical warfare -- Canada. 1 Chemical warfare -- Fiction 4 Chemical warfare -- History. 1 Chemical warfare -- History -- To 1500 1 Chemical warfare -- Juvenile literature 6 Chemical warfare -- Research -- United States -- History -- 20th century 1 Chemical warfare -- United States -- History -- 20th century 1 Chemical weapons 2 SEE ALSO narrower term: Chemical agents (Munitions) 2 10 20 30 50 100 per page < Previous 10 Headings Next 10 Headings >