(3GdehTMGJ aj HdGO GdTGe efP fTCJgG MJi fgGjI GdbQf GdKGfj YTQ GdgLQj (B/ s - (3QMje, ebOGOs ((3HjQhJ (B:s (3YGde GdcJH,s, 1987)
Keywords: (3GdTYQ GdCfOdSjs; (3GdehTMGJs