(3eLdI GdJfejI GdEOGQjI(B.s (3jfGjQ (B1981 /s ((3GdbGgQI(B:s (3GdLgGR GdeQcRj ddJfXje hGdEOGQI,s, 1981)
(3JbhjV GdSdWI (B/s (3C(B. (3fHjd Jhajb(B.s
(3eLdI YdejI(B.s
(3GdYOO GdYGTQ(B.s
Keywords: (3GdbGfhf GdEOGQjs -- (3OhQjGJs