(3OSJhQ ddCeI ef GdbQBf hGdSfI (B/s - (3YHO GdfGUQ Jhajb GdYWGQs ((3eUQ (B:s (3eDSSI GdHSJGfi ddWHGYI,s, 1989)
(3jTJed Ydi EQLGYGJ HHjdhLQGajI(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdGSdGe hGdeLJeYs -- (3bVGjG GdGUdGM GdGLJeGYi hGdGbJUGOi hGdSjGSis -- (3GdbQBf hGdSfIs -- (3JaSjQs