REFERENCES
- Marx, R.: The Health of the Presidents. New York, G. P. Putnam's Sons, 1960.
- Robertson, C. W.: Some observations on Presidential illnesses. Boston Med Quart 8, No. 2 and 3, June and September 1957.
- Smith, G.: When the Cheering Stopped; the Last Years of Woodrow Wilson. New York, William Morrow and Company, 1964.