(3GdehSjbGQ GdUZjQ (B/ s - (3GdYSdj, WGQbs ((3HjQhJ (B:s (3OGQ GdYde ddedGjjf,s, 1980)
Keywords: (3GdbUU GdYQHjIs; (3COH GdCWaGds; (3GWaGd eQMdI eJhSWI (B(6-9)(3SfhGJs