by Joseph Deniker
by Margaret Alice Murray
by Edward B. (Edward Burnett) Tylor
by comte de Arthur Gobineau
by Ignatius Donnelly
by J. G. (John George) Wood
by A. H. (Augustus Henry) Keane
by Edward B. (Edward Burnett) Tylor
by Hans Fehlinger
by J. G. (John George) Wood
by Louis Figuier
by Georg Buschan
by R. G. (Robert Gordon) Latham
by Daniel G. (Daniel Garrison) Brinton
by Arthur James Johnes
by R. G. (Robert Gordon) Latham
by Thomas Henry Huxley
by Georg Karl Cornelius Gerland
by R. G. (Robert Gordon) Latham
by Erwin Baur , Eugen Fischer , Fritz Lenz
by comte de Arthur Gobineau
by R. G. (Robert Gordon) Latham
by M. T. H. (Michael Theophile Hubert) Perelaer
by Thomas Henry Huxley
by Grafton Elliot Smith
by Robert Harry Lowie
by Thomas Henry Huxley
by Jaakko Forsman