(3JhMjO GdbGfhf GdNGU (B/s - (3YHOGdefYe GdHOQGhjs; (3LGeYI GdbGgQIs (3cdjI GdMbhbs ((3GdbGgQI(B:s (3cdjI GdMbhb (B- (3LGeYI GdbGgQI ,s, 1960)
Keywords: (3GdJhMjO GdLRFjs; (3GdJhMjO GdOGNdjs; (3GdJhMjO GdOhdjs