(3GdEYdGe GdYQHj MGVQ h eSJbHdG (B:s (3fMh fXGe YQHj ddGYdGe h GdGJUGd (B/s - (3JbQjQ GddLfI GdYQHjI dOQGSI bVGjG s ((3JhfS (B:s [(3Ohf fGTQ(B] (3,s, 1987)
Keywords: (3GdYQHjs; (3MGVQs; (3eSJbHdGs; (3GdGYdGes