| The United Nations series Matches 1 item |
| The United States Matches 1 item |
| The United States and the Americas Matches 4 items |
| The United States in the world Matches 9 items |
| The United States in the world, foreign perspectives Matches 1 item |
| The United States : past and present Matches 1 item |
| The Universal library, UL-178 Matches 1 item |
| The Universal library, UL 180 Matches 1 item |
| The Universal library, UL172 Matches 1 item |
| The universe and our place in it Matches 1 item |