(3eLehYI eMGVQGJ GdYGe GdOQGSi GdKGdK (B/s - (3eYgO GdOQGSGJ GdeUQajIs ((3GdbGgQI (B:s (3GdeWHYI GdYGdejI(B,s, 1957)
(3jTed Ydi GQLGYGJ HHdjhLQGajIs
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdeGdjI GdYGeI h GdJTQjY GdVQjHj s