(3fUhU eNJGQI ef GdJQGK GdhLhOi (B/ s - (3aGd, LGf (B((3hGNQhf(B)s; (3aDGO cGed (B((3eJQLe(B)s ([S.N] : (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1987)
Keywords: (3GdadSaIs; (3Yde GdfaSs; (3GdhLhOjIs; (3eG hQGA GdWHjYI(B, (3Ydes