(3deMGJ COHjI ef djHjG (B/ s - (3GdeUQGJj, Ydj eUWais ((3WQGHdS (B((3GdZQH(B) :s (3GdHeWHYI GdMchejI,s, 1956)
Keywords: (3GdCOH GdYQHjs; (3djHjGs; (3GdfbO GdCOHjs