(3GdehGQjK hGdgHI hGdhUjI (B/ (3eMeO ceGd MeOj(B.s - (3MeOj, eMeO ceGds ((3GdEScfOQjI, eUQ (B:s (3OGQ GdeWHhYGJ GdLGeYjI,s, 1987)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B.s
Keywords: (3GdehGQjKs -- (3bhGfjf hJTQjYGJ s -- (3eUQs; (3GdhUGjG (B((3bGfhf(B)s -- (3eUQs