(3OQhS aj GdGbJUGO GdSjGSj (B:s (3GdLRA GdChd (B/s - (3GfWhGf GjhH s ((3MdH (B:s (3eOjQjI GdcJH hGdeWHhYGJ GdLGeYjI(B,s, 1965)
Keywords: (3GdeGdjI GdYGeI hGdJTQjY GdVQjHjs