(3GdeUhf aj GdCOH (B/ s - (3GdYScQj, CHh CMeO GdMSf Hf YHO Gddgs; (3gGQhf, YHO GdSdGe eMeOs ((3GdchjJ (B:s (3eWHYI McheI GdchjJ,s, 1960)
Keywords: (3GdTYQ GdYQHjs; (3GdfbO GdCOHjs