(3eYGjfI eSQM GdLQjeI(B. s (3GdLRA GdChd (B/s - (3eMeO eMeO eMeO YfH(B.s ((3GdQjGV(B:s (3GdeQcR GdYQHj ddOQGSGJ GdCefjI hGdJOQjH,s, 1991)
(3jTJed Ydi GQLGYGJ HHdjhLQGajIs
Keywords: (3GdGfJbGd hGdeYGjfIs; (3bGfhf GdGLQGAGJ GdLfGFjIs