- Libro electrónicoMen of the Old Stone Age Their Environment, Life and ArtHenry Fairfield Osborn
- Libro electrónicoDinosaurs With Special Reference to the American Museum CollectionsBarnum Brown
- Libro electrónicoPalæontological Report of the Princeton Scientific Expedition of 1877Henry Fairfield Osborn
- Libro electrónicoMen of the Old Stone AgeHenry Fairfield Osborn
- Libro electrónicoPalæontological Report of the Princeton Scientific Expedition of 1877Henry Fairfield Osborn
- Libro electrónicoMen of the Old Stone Age Their Environment, Life and ArtHenry Fairfield Osborn