(3GdUMjM ef NWH GdfHj (B: s 25 (3NWHI fHhjI aj TJi GdefGSHGJ (B/ s - (3GdSjO, eLOj aJMjs ((3WfWG (B:s (3OGQ GdUMGHI ddJQGK,s, 1993)
Keywords: (3GdCOH GdYQHjs; (3GdNWGHIs; (3GdSjQI GdfHhjIs