(3ChGeQ GdCOGA aj eUQ hGdOhd GdYQHjI hGdCLfHjI (B/s - (3GdfeQ, CejfI eUWai(B.s ((3GdEScfOQjI, eUQ (B:s (3OGQ GdeWHhYGJ GdLGeYjI,s, 1989)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B.s
(3HHdjhLQGajI (B: (3U(B. 7-9.s
Keywords: (3bGfhf GdeQGaYGJs; (3bGfhf GdeQGaYGJs -- (3eUQs; (3bGfhf GdeQGaYGJs -- (3GdHdGO GdYQHjIs