(3eGFI GhGFd ef JQGKfG (B/ s - (3Sgjd RcGQs ((3OeTb (B:s (3OGQ MSGf ddWHGYI hGdfTQ,s, 1989)
(3jTJed Ydi GQLGYGJ HHdjhLQGajIs
Keywords: (3GdYdeGA GdeSdehfs -- (3JQGLes; (3GdUMGHI hGdJGHYhfs -- (3JQGLes; (3GdQLGds -- (3JQGLes