(3TQM bWQ GdfOi hHd GdUOi (B/ s - (3EHf gTGe, LeGd GdOjf CHh eMeO YHO Gddgs ((3HjQhJ (B:s (3OGQ GdNjQ,s, 1990)
Keywords: (3GddZI GdYQHjIs; (3bhGYO GddZIs; (3GdfMh h GdUQas