(3GdELgGV hbJd GdCWaGd MOjKi GdhdGOI cCge eXGgQ ELQGe GdfSGA (B/s - (3gdGdj YHO GddGg CMeOs ({(3ecGf GdfTQ ZjQ eMOO (B}s {(3GdfGTQ ZjQ eMOO(B}s, 1989)
(3jTJed Ydj HHdHhLQGajI(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdELgGVs; (3GdbGfhf GdLfGFjs