On the phenomena of hybridity in the genus homo.
London :Pub. for the Anthropological society, by Longman, Green, Longman, & Roberts,1864.
University of California Libraries (archive.org)
Evidence reported by alyson-wieczorek for item onphenomenaofhyb00brociala on July 25, 2007: no visible notice of copyright; stated date is 1864.