(3ef CTQGQ MQha GdLQ ai GdPcQ GdMcje (B/s - (3eMeO GdCejf GdNVQis ((3GdbGgQI (B:s (3ecJHI hgHI,s, 1989)
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdbQBf GdcQje hGdYdhe GdbQBfjIs; (3GdTQjYI GdESdGejIs