(3MhGQ ef GdCHOjI (B: s (3TYQ (B/ s - (3YHO GddWja, dWajs ((3HjQhJ (B:s (3eWGHY OGQ dHfGf,s, 1969)
Keywords: (3GdTYQ GdYQHjs; (3GdYUQ GdMOjKs; (3djHjGs