(3JNQjL GdaQhY Ydi GdCUhd (B/s - (3GdRfLGfj, eMehO Hf CMeO Hf eMehO,s 573-656 (3gLQjG(B.s; (3UGdM, eMeO COjHs ((3HjQhJ (B:s (3eDSSI GdQSGdI,s, 1987)
Keywords: (3CUhd Gdabg GdESdGejs