I mostly relied on long-lost newspaper accounts for this article, because of a lack of good secondary sources. The only serious study of these charges is Edmund Kallina's excellent Courthouse Over White House: Chicago and the Presidential Election of 1960, although despite the subtitle Kallina focuses more on local politics than on the presidential race. Nixon writes about the issue in both of his memoirs, Six Crises and RN. Earl Mazo and Stephen Hess endorse the stolen-election idea in Richard Nixon: A Personal and Political Portrait. Biographies that add original contributions are Herbert Parmet's Richard Nixon and His America and Fawn Brodie's Richard Nixon: The Shaping of His Character. Other accounts, which have a conspiratorial bent and should be taken with a grain of salt, appear in Seymour Hersh's The Dark Side of Camelot, Patrick Mahoney's Sons and Brothers, and Anthony Summers's Arrogance of Power: The Secret World of Richard Nixon.