(3eTcdGJ GdbGQI GdEaQjbjI GdSjGSjI h GdGbJUGOjI (B/s - (3QGTO GdHQGhi s ((3GdbGgQI (B:s (3ecJHI GdCfOdh GdeUQjI (B,s, 1960)
(3jTJed Ydi EjVGMjGJ, NQGFW (B.s
. 419-421 (3HHdjhLQGajG(B: (3UaMGJ(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdeGdjI GdYGeI h GdJTQjY GdVQjHi s; (3GdGbJUGOs -- (3EaQjbjGs; (3GdSjGSI s -- (3EaQjbjGs; (3GdeTcdGJ GdGbJUGOjI s; (3GdeTcdGJ GdSjGSjI s