(3TQM GdJHQjRI Ydi HGJJ SgGO (B/ s - (3cYH Hf RgjQs; (3YHOGdQMje jhSa GdLeds ([S.N] : (3ecJHI GdGOGH , s, 1990)
Keywords: (3GdTYQ GdYQHis; (3UOQ GdGSdGes