(3GdLhGH GdcGai def SGd Yf GdOhGA GdTGai (B: s (3GdeSei GdOGA hGdOhGA (B/ s - (3GHf bje GdLhRjI(B: (3TeS GdOjf GHh YHOGddg eMeO Hf GHi HcQs; (3Ydi LeYI eMeOs ((3GdbGgQI (B: s (3OGQ GdcJHi , s, 1991)
Keywords: (3GdKbGaI GdGSdGejIs; (3GdTQjYI GdGSdGejIs; (3Gdabg GdGSdGeis