(3JZPjI Wadc (B: s (3cja JDefjf YGOGJ JZPjI SdjeI aj gPI GdSfhGJ GdSJ GdChdi GdMjhjI (B: (3GdMbGFb h GdhUaGJ (B/ s - (3YjJGfj, BeGd bHjSjs; (3YjfJGfj, YGUes ((3HjQhJ (B:s (3OGQ EMjGA GdYdhe,s, 1990)
Keywords: (3GdCWaGds; (3GdQYGjI GdUMjIs