(3GdJWhQGJ GdSjGSjI hGdGbJUGOjI aj GdYGde GdYQHj (B/s - (3YHO GdSdGe HOhj(B.s ((3eUQ (B:s (3GdeJMOI ddfTQ hGdJhRjY,s, 2000)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B.s
(3HHdjhLQGajG(B: (3UaMGJ (B409-422.s
Keywords: (3GdYdGbGJ GdOhdjI GdGbJUGOjI(B.s