(3GdWbS h GdefGN (B:s (3OQGSI aj WHjYI GdLh h LZQGajI GdefGN (B/s - (3agej, gdGdj CHh GdYWGs ((3GdGScfOQjI (B:s (3OGQ GdeYQaI GdLGeYjI ,s, 1985)
Keywords: (3GdefGN s; (3LZQGajI GdefGNs; (3WHjYI GdLh s; (3GdWbS s