(3bGfhf GdGKHGJ (B: s (3eY bQGQGJ eLdS bjGOI GdKhQI GdJj YGdLJ HYV GMcGe gPg GdJTQjYGJ, eY GdJYdjb hGdTQM, hGdGSJTgGO HGdeHGOF GdbVGFjI GdeSJNdUI ef GMcGe eMceI GdJejjR (B/ s - (3GdcQHGSj, Ydj eMeO GHQGgje, s ((3HZOGO(B[(3GdYQGb(B] : s (3eWHYI GdYeGd GdeQcRjI (B990s, 1990)
(3jJVef GQLGYGJ HHdjhLQGajI(B.s
Keywords: (3GdGKHGJ (B((3bGfhf(B)s -- (3GdYQGb(B.s