Scientific Concepts


national movement national network national organizations national origin national parks national parliaments national patterns national pension systems national perspective national policy national political systems	national politics national population national postal survey national prevalence national priorities national probability sample national product national profile national programme national project national random sample national rates	national reference national registers national regulations national regulatory authorities national representative sample national resources national responses national sample national saving national scale national screening programme national security	national self-determination national societies national sovereignty national standard national standards national state national states national stereotypes national strategy national studies national study national surveillance	national survey national survey data national systems national target