Columbia subject headings:
Liberalism--United States--History--20th century.
Progressivism (United States politics)
United States--Politics and government--1865-1933.
Harvard subject headings:
Liberalism--United States--History--20th century
Progressivism (United States politics)
United States--Politics and government--1865-1933.
Princeton subject headings:
Liberalism--United States--History--20th century.
Progressivism (United States politics)
United States--Politics and government--1865-1933.