(3GdeSGgeI GdLfGFjI ai GdJTQjYGJ GdYQHjI (B/s - (3eMehO fLjH MSfjs ((3GdbGgQI (B:s (3eYgO GdOQGSGJ GdYQHjI GdYGdjI,s, 1960)
(3jTJed Ydj GQLGYGJ HHdjhLQGajI(B.s
(3GdfU CZdHg HGddZI GdYQHjI eY HYV GdfUhU GdEfLdjRjIs
Keywords: (3GdeSGgeI GdLfGFjIs; (3GdbGfhf GdLfGFjs