Title: The United States enters the 20th century
Subjects: Politics and government, Juvenile literature, Progressivism (United States politics), History, United states, history, 1865-1898, United states, history, 1919-1933, United states, history, 20th century, juvenile literature, United states, politics and government, United states, politics and government, juvenile literature
Places: United States
Time periods: 1919-1933, 1865-1921, 1865-1933