id	keyword
concept-2078	ddt
concept-2078	war
concept-2078	insects
concept-2078	chemical
concept-2078	pesticide
concept-2078	new
concept-2078	world
concept-2078	malaria
concept-2078	bugs
concept-2078	vol
concept-2078	pacific
concept-2078	concept
concept-2078	xxxix
concept-2078	american
concept-2078	companies
concept-2078	world war
concept-2078	carson
concept-2078	advertisement
concept-2078	press
concept-2078	science
concept-2078	military
concept-2078	killing
concept-2078	consumers
concept-2078	health
concept-2078	spring