(3Gdfeh ef GdWahdI Edi GdeQGgbI(B/s - (3efUhQ,eMeO Lejd eMeO jhSa s; (3YHOGdSdGe,aGQhb SjOs ((3LOI(B-(3GdeedcI GdYQHjI GdSYhOjI(B:s (3JgGeI,s, 1989)
Keywords: (3Yde GdfaS GdGQJbGFjs; (3GdCWaGds -- (3Yde faSs; (3GdeQGgbIs -- (3LhGfH faSjIs