(3GOGH Gdedhc (B/ s - (3Ldjd GdYWjI (B((3JMbjb(B)s; (3GdKYGdHi (B: (3GHhefUhQ YHOGdedc Hf eMeO Hf GSeGYjd GdfjSGHhQis ((3HjQhJ (B: s (3OGQ GdZQH GdGSdGei , s, 1990)
Keywords: (3Gdedhc hGdMcGes; (3Gdedhc hGdMcGe ai GdGOHs; (3Gdedhcs