(3GdhSjW aj bGfhf EjLGQ GdCeGcf (B/ s - (3YWG Gddg, HQgGe eMeO s ((3GdEScfOQjI, eUQ (B: s (3eDSSI GdKbGaI GdLGeYjI, s, 1982)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B. s
Keywords: (3GdEjLGQGJ s -- (3bhGfjf hJTQjYGJs -- (3eUQ s