(3eYGQc GdYQH GdMGSeI (B((3gOjI ef GdGOjH YHOGdaJGM GdLed(B) / s - (3UHMi YHOGdeLjOs ([S.N] : (3eDSSI GdGHMGK GdYQHjI , s, 1967)
Keywords: (3GdaJhMGJ GdGSdGejIs; (3GdJGQjN GdGSdGeis; (3GdeYGQc GdYQHjI GdGSdGejIs