(3GdJaSjQ GdGYdGej dUMjM GdHNGQj (B:s (3cJGH HOiA(B- (3cJGH GdGjeGf (B/s - (3MLGH,eMeO efjQ s ((3GdbGgQI (B:s (3OGQ GdaLQ ,s, 1990)
Keywords: (3GdJaSjQ GdGYdGej s; (3UMjM GdHNGQj s; (3cJGH GdGjeGf s; (3cJGH HOiAs