id	keyword
cpos-369	migration
cpos-369	et al
cpos-369	population
cpos-369	data
cpos-369	ows
cpos-369	countries
cpos-369	ravenstein
cpos-369	doi
cpos-369	international
cpos-369	rees
cpos-369	analysis
cpos-369	migrant
cpos-369	country
cpos-369	model
cpos-369	time
cpos-369	migration data
cpos-369	census
cpos-369	year
cpos-369	age
cpos-369	bell
cpos-369	estimates
cpos-369	research
cpos-369	interval
cpos-369	spatial
cpos-369	philip
cpos-369	tables
cpos-369	distance
cpos-369	fl ows
cpos-369	abel
cpos-369	use
cpos-369	world
cpos-369	lifetime
cpos-369	information
cpos-369	residence
cpos-369	nik
cpos-369	statistics
cpos-369	net
cpos-369	stillwell
cpos-369	methods
cpos-369	place
cpos-369	period
cpos-369	rogers