(3TQM bGfhf GdYbhHGJ (B:s (3GdbSe GdNGU(B.s (3GdLRA GdChd,s (3GdLQGFe GdhGbYI Ydi Cef GdOhdI GdNGQLj (B/s - (3GdNGfj, eMeO QjGV s; (3GdMcje, LGc jhSas ((3OeTb (B:s (3efThQGJ LGeYI MdH,s, 1989)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B.s
Keywords: (3bGfhf GdYbhHGJs -- (3ShQjGs; (3GdLQGFe GdSjGSjIs -- (3ShQjGs