id	keyword
inhs-253	prairie
inhs-253	illinois
inhs-253	chickens
inhs-253	prairie chicken
inhs-253	birds
inhs-253	young
inhs-253	area
inhs-253	range
inhs-253	cent
inhs-253	booming
inhs-253	game
inhs-253	state
inhs-253	study
inhs-253	illinois prairie
inhs-253	present
inhs-253	nests
inhs-253	land
inhs-253	field
inhs-253	nesting
inhs-253	redtop
inhs-253	cover
inhs-253	county
inhs-253	ground
inhs-253	species
inhs-253	total
inhs-253	food
inhs-253	season
inhs-253	number
inhs-253	northern
inhs-253	winter
inhs-253	soil
inhs-253	period
inhs-253	males
inhs-253	eggs
inhs-253	studies
inhs-253	jasper
inhs-253	farming
inhs-253	years
inhs-253	ph.d
inhs-253	spring
inhs-253	fig
inhs-253	region
inhs-253	evidence
inhs-253	populations
inhs-253	central
inhs-253	fall
inhs-253	grain
inhs-253	time
inhs-253	yeatter
inhs-253	management
inhs-253	low
inhs-253	hawks
inhs-253	counties
inhs-253	census
inhs-253	1939
inhs-253	wildlife
inhs-253	grass
inhs-253	survey