(3bhGfjf GdQHW GdMcei(B.s (3hGdVQjHI GdKGHJI Ydi Gdegf GdMQI hGdJjSjQGJ GdVQjHjI GdbGfhf Qbe (B14 (3dSfI (B1939 /s - (3MTeJ ejNGFjd s ((3GdbGgQI (B:s (3ecJHI GdCfLdh GdeUQjI (B,s, 1971)
(3GdfU HGddZI GdYQHjIs
Keywords: (3VQFH GdONd Ydi Gdegf GdMQIs