(3GdJfejI GdJcfhdhLjI (B:s (3eaghegG h eJWdHGJgG (B/s - (3GdYHjO, jYbhH agO(B.s ((3GdbGgQI (B:s, 1989)
(3jMJhi Ydi bGFeI HjHdhLQGajI HGdeQGLY(B.s
1
Keywords: (3GdJcfhdhLjG(B.s; (3GdJfejI(B.s