Historical dictionary of the Progressive Era, 1890-1920

The income tax and the Progressive era

Encyclopedia of the Gilded Age and Progressive Era

Urban liberalism and progressive reform

Those United States

Multiculturalism in the United States

Milwaukee in the 1930s

Urban history

The Gilded Age And Progressive Era 1877-1920 (Sources of the American Tradition - The Gilded Age and Progressive Era 1877-1920)

Progressivism

Progressive reform

Progressive Era, 1893-1914 Vol. 4

Invention City