1. 1953–57 Razze e I Populi Della Terra. Vol. 1–4 Second Edition, Unione Tipografico-Editrice Torinese.
2. Some Problems of Human Variability and Natural Selection in Climate and Culture
3. 1926 Les Races et Les Peuples De La Terre. Masson, Paris.
4. 1894 L'Étude Des Races Humaines. Schleicher Freres, Paris.