(3bGfhf GdYed (B: s (3YbO GdYed GdaQOj (B/ s - (3eMehO, geGe eMeO s ((3GdEScfOQjI, eUQ (B:s (3OGQ GdeYQaI GdLGeYjI, s, 1987)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B. s
Keywords: (3GdYed hGdYeGd s -- (3bhGfjf hJTQjYGJs -- (3eUQs; (3YbhO GdYeds -- (3bhGfjf hJTQjYGJs -- (3eUQ s