(3ehShYI Ydi GdGKGQ(B/s - (3OGfjGd ,cdjfs; (3jhSa,djhfs ((3HZOGO(B[(3GdYQGb(B]:s (3OGFQI GdGYdGe hRGQI GdKbGag hGdGYdGe,s, 1991)
Keywords: (3GdGKGQs