Herbert Hoover, Arnold S. Rice, United States. President (1929-1933 : Hoover) (1971). “Herbert Hoover, 1874-1964; chronology-documents-bibliographical aids”, Oceana Pubns
United States. President (1929-1933 : Hoover), Herbert Hoover (1974). “Herbert Hoover: Containing the Public Messages, Speeches, and Statements of the President”