(3GdGMcGe GdUZQi (B/ s - (3SYjO GMeO GYQGHs; (3GHf GdYQHi (B: (3GHh HcQ eMeO Hf YHOGddg Hf eMeO Hf GMeO Hf GMeO GdeYGaQi GdGTHjdi GdeGdcis ((3GdeZQH (B: s (3GdefXeI GdGSdGejI ddJQHjI hGdYdhe hGdKbGaI , s, 1991)
Keywords: (3GdGMcGes; (3Gdabg GdGSdGeis; (3GdbQGfs