(3GdefgL GdESdGej aj GdLQM hGdJYOjd (B:s (3OQGSI efgLjI aj Ydhe GdMOjK (B/s - (3MeGOI, aGQhbs ((3GdQjGV (B:s (3OGQ WjHI,s, 1997)
Keywords: (3GdMOjKs -- (3GdLQM hGdJYOjds