(3GdeSQM aj GdhWf GdYQHj (B/ s - (3GdQGYj, Ydjs ((3GdchjJ (B:s (3GdeLdS GdhWfj ddKbGag h Gdafhf h GdCOGH,s, 1980)
Keywords: (3GdeSQMs; (3GdHdOGf GdYQHjIs