Hayes, J. R. (1869). Negrophobia "on the brain," in white men: Or, An essay upon the origin and progress, both mental and physical, of the Negro race, and the use to be made of him by the politicians in the United States. Washington D. C.: Powell, Ginck & Co., prs..

Hayes, J. R. Negrophobia "on the Brain," in White Men: Or, An Essay Upon the Origin and Progress, Both Mental and Physical, of the Negro Race, and the Use to Be Made of Him By the Politicians in the United States. Washington D. C.: Powell, Ginck & Co., prs., 1869.

Hayes, J. R. Negrophobia "on the Brain," in White Men: Or, An Essay Upon the Origin and Progress, Both Mental and Physical, of the Negro Race, and the Use to Be Made of Him By the Politicians in the United States. Washington D. C.: Powell, Ginck & Co., prs., 1869.