(3GdSdhc hGdbjGS GdTNUj aj Yde GdfaS (B:s (3OQGSI fXQjI ejOGfjI (B/s - (3RjYhQ, eMeOs ((3HjQhJ (B:s (3QTGO HQS ddWHGYI hGdfTQ hGdJhRjY,s, 1990)
(3HHdjhLQGajI (B: (3UaMI (B237-238.s
Keywords: (3GdTNUjIs -- (3LhGfH faSjIs; (3GdSdhcs -- (3LhGfH faSjIs; (3GdbjGS GdfaSjs