(3bUI GdejGg aj GdCQOfs - (3Gd(B^(3RYHj(B. (3YOfGfs ((3eOjQjI GdJhYjI GdeGFjIs (3YeGfs, 1999)
(3fSNJGf ef faS GdcJGHs
Keywords: (3GdCQOfs; (3ejGgs