(3LQjeI GdRfG (B:s (3Hjf GdTQGFY GdSeGhjI hGdbhGfjf GdhVYjI (B/s (3GdYOO GdChd,s - (3YHO GdhgGH YeQ GdHWQGhis ((3GdbGgQI (B:s (3OGQ GdUahI ddWHGYI hGdfTQ hGdJhRjY,s, 1991)
(3jTJed Ydi GQLGYGJ HHdjhLQGajI(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdbGfhf GdLfGFjs; (3GdRfGs