(3cJGH GdSff GdcHQi (B/ s - (3GdfSGFj, CHh YHO GdQMef CMeO Hf Ydjs; (3GdHfOGQj, YHO GdZaGQs ((3HjQhJ (B:s (3OGQ GdcJH GdYdejI,s, 1991)
Keywords: (3Ydhe GdMOjKs; (3GdMOjK GdTQjas; (3Sff GdfSGFjs