id	keyword
inhs-175	sex ratios
inhs-175	age ratios
inhs-175	drakes
inhs-175	ducks
inhs-175	illinois
inhs-175	species
inhs-175	data
inhs-175	breeding
inhs-175	mallard
inhs-175	adult
inhs-175	juveniles
inhs-175	hunters
inhs-175	hens
inhs-175	number
inhs-175	table
inhs-175	production
inhs-175	wildlife
inhs-175	manitoba
inhs-175	waterfowl
inhs-175	cent
inhs-175	year
inhs-175	grounds
inhs-175	population
inhs-175	bags
inhs-175	areas
inhs-175	survey
inhs-175	flyway
inhs-175	mississippi
inhs-175	saskatchewan
inhs-175	hunting
inhs-175	fig
inhs-175	history
inhs-175	season
inhs-175	natural
inhs-175	mallard drakes
inhs-175	period
inhs-175	conditions
inhs-175	assistant
inhs-175	bellrose
inhs-175	differences
inhs-175	ph.d
inhs-175	north
inhs-175	fish
inhs-175	august
inhs-175	migration
inhs-175	teal
inhs-175	bulletin
inhs-175	nesting
inhs-175	pintail
inhs-175	serv
inhs-175	river
inhs-175	spring
inhs-175	bagged
inhs-175	birds
inhs-175	study
inhs-175	mortality
inhs-175	breeding grounds
inhs-175	adult drakes
inhs-175	art