On purification, see David W. Southern, The Malignant Heritage: Yankee Progressives and the Negro Question, 1901–1914, (1968); Southern, The Progressive Era And Race: Reaction And Reform 1900–1917 (2005); Steven Mintz, "Beaner Restriction" in Digital HistoryArkiverad 10 juni 2012 hämtat från the Wayback Machine.; Norman H. Clark, Deliver Us from Evil: An Interpretation of American Prohibition (1976) p 170; and Aileen Kraditor, The Ideas of the Woman Suffrage Movement: 1890–1920 (1967). 134–36
On purification, see David W. Southern, The Malignant Heritage: Yankee Progressives and the Negro Question, 1901–1914, (1968); Southern, The Progressive Era And Race: Reaction And Reform 1900–1917 (2005); Steven Mintz, "Beaner Restriction" in Digital HistoryArkiverad 10 juni 2012 hämtat från the Wayback Machine.; Norman H. Clark, Deliver Us from Evil: An Interpretation of American Prohibition (1976) p 170; and Aileen Kraditor, The Ideas of the Woman Suffrage Movement: 1890–1920 (1967). 134–36