(3OjhGf GdGeGe GdTGaYi (B/ s - (3eMeO YHOGdQMef YhV (B((3eMbb(B)s; (3GdTGaYi, GHhYHOGddg eMeO Hf GOQjS, (B767-819 (3es ([S.N] : (3OGQ GdcJH GdYdejI ddfTQ hGdJhRjY , s, 1990)
Keywords: (3OhGhjf hbUGFOs; (3GdTYQs