George W. Bush “Public Papers of the Presidents of the United States, George W. Bush, 2004, Book 2, July 1 to September 30, 2004”, Government Printing Office
Daily Telegram number 2678 on March 06, 1935. "Will Rogers' Daily Telegrams: The Roosevelt years, 1933-1935". Book edited by Steven Gragert and James Smallwood, 2008.
Will Rogers, Bryan B. Sterling, Frances N. Sterling (1993). “Will Rogers' World: America's Foremost Political Humorist Comments on the Twenties and Thirties--and Eighties and Nineties”, p.80, Rowman & Littlefield