id	keyword
easat-4268	development
easat-4268	municipalities
easat-4268	population
easat-4268	bulgaria
easat-4268	region
easat-4268	vol
easat-4268	eastern
easat-4268	municipality
easat-4268	enterprises
easat-4268	national
easat-4268	people
easat-4268	socio
easat-4268	areas
easat-4268	migration
easat-4268	number
easat-4268	authors