(3fMd GdYSd aj GdbQBf hGdWH (B/s - (3GdHfHj, eMeO Ydjs ((3GdbGgQI(B:s (3eQcR GdCgQGe ddJQLeI hGdfTQ,s, 1987)
(3HHdjhLQGajI (B: (3U (B191-202.s
Keywords: (3GdCOhjIs; (3GdfMds; (3YSd GdfMds; (3GdbQBf hGdYdhes; (3GdYbGbjQs