(3TQM bGfhf GdCMhGd GdTNUjI GdShOGfj dYGe (B1991 (3e(B.s (3GdbSe GdKGfj,s (3GdaQbI hMbhb GdCbGQH (B/s - (3EHQGgje, EHQGgje YHO GdQMefs ((3GdNQWhe (B:s (3OGQ LGeYI GeOQeGf GdESdGejI,s, 1994)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B.s
Keywords: (3GdCbGQHs -- (3Mbhb eOfjIs -- (3GdShOGfs; (3GdCMhGd GdTNUjIs -- (3bhGfjf hJTQjYGJs -- (3GdShOGfs