(3eMGVQGJ aj GdfXQjI GdYGeI ddYbhHI (B/s - (3gdGdj YHO GddGg CMeOs ((3GdbGgQI (B:s (3OGQ GdfgVI GdYQHjI ,s, 1991)
. 226-223(3HHdjhLQGajG(B: (3UaMGJ(B.s
(3jTJed Ydi EQLGYGJ HHdjhLQGajIs
Keywords: (3GdYbhHIs; (3GdbGfhf GdLfGFjs