(3GdSfhGJ GdMQLI aj JGQjN GdeNOQGJ (B:s (3fPQ GdNWQ hYdGeGJ GdJaGDd (B/s - (3YjO, eMeO aJMjs ((3GdQjGV (B:s (3hRGQI GdOGNdjI, eQcR CHMGK ecGaMI GdLQjeI,s, 1990)
(3HHdjhLQGajI (B: (3UaMI (B196-198.s
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B.s
Keywords: (3ecGaMI GdeNOQGJs; (3GdeNOQGJ hGdTHGHs; (3EOeGf GdeNOQGJs