January 1919. Archived from the original on February 18, 2017. Retrieved February 28, 2017.

^ Thayer 1919, pp. 4–7.

^ Miller 1992, pp. 539–540.

^ Miller 1992, pp. 548–549.

^ Miller 1992, pp. 550–551.

^ Miller 1992, pp. 552–553.

^ McGeary, M. Nelson (July 1959). "Gifford Pinchot's Years of Frustration, 1917–1920". The Pennsylvania Magazine of History and Biography. 83 (3): 327–342. JSTOR 20089210.

^ Brands 1997, pp. 749–751, 806–809.

^ Roosevelt 1917, p. 347.

^ "Enroll Westerners for Service in War; Movement to Register Men of That Region Begun at the Rocky Mountain Club. Headed by Major Burnham. John Hays Hammond and Others of Prominence Reported to be Supporting Plan" (PDF). New York Times. March 13, 1917. p. 11. Archived (PDF) from the original on February 25, 2021. Retrieved June 30, 2013.

^ "Will Not Send Roosevelt; Wilson Not to Avail Himself of Volunteer Authority at Present". New York Times. May 19, 1917. ISSN 0362-4331.

^ Roosevelt 1917.

^ Brands 1997, pp. 781–784.

^ Cramer, CH (1961), Newton D. Baker, pp. 110–113.

^ Jump up to: a b Dalton 2002, p. 507.

^ Henry F. Pringle, Theodore Roosevelt: A Biography (1931) p. 519

^ J. Lee Thompson (2014). 