Iowa – Encyclopedia of U.S. History
Invisible Man – Encyclopedia of U.S. History
Interstate Commerce Act – Encyclopedia of U.S. History
Internet Revolution – Encyclopedia of U.S. History
Industrial Revolution – Encyclopedia of U.S. History
Indiana – Encyclopedia of U.S. History
Indian Territory – Encyclopedia of U.S. History
Indian Reservations – Encyclopedia of U.S. History
Indian Appropriations Act – Encyclopedia of U.S. History
Indentured Servitude – Encyclopedia of U.S. History