id	keyword
easat-6979	lao
easat-6979	transit
easat-6979	customs
easat-6979	rail
easat-6979	thailand
easat-6979	pdr
easat-6979	transport
easat-6979	asean
easat-6979	procedures
easat-6979	system
easat-6979	window
easat-6979	border
easat-6979	vol
easat-6979	authors