(3LQGFe GdeNOQGJ aj GdJTQjY GddjHj (B/ s - (3GdOgHj, EOhGQ ZGdj s ((3HfZGRj, djHjG (B: s (3GdecJHI GdhWfjI, s, 1973)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B.s
Keywords: (3GdeNOQGJs -- (3bhGfjf hJTQjYGJ s -- (3djHjG s; (3bGfhf GdELQGAGJ GdLfGFjIs -- (3djHjG s