Political Realignment of the 1850s." JournalofAmericanHistory 64 (1977–78): 959-86. **also in The Civil War Party System: The Case of Massachusetts, 1848–1876
Bureau of Investigation and its Critics, 1919–1921: the Origins of Federal Political Surveillance. JournalofAmericanHistory (Organization ofAmerican Historians)
Popper, Deborah E.; Popper, Frank J. "Progress of the Nation": The Settlement Historyof the Enduring American Frontier. Western Historical Quarterly. 1995