- Cărți electroniceThe Earth as Modified by Human ActionGeorge P. Marsh
- Cărți electroniceThe Whelps of the WolfGeorge P. Marsh
- Cărți electroniceMan and Nature; Or, Physical Geography as Modified by Human ActionGeorge P. Marsh
- Cărți electroniceMan and Nature; Or, Physical Geography as Modified by Human ActionGeorge P. Marsh
- Cărți electroniceMan and NatureGeorge P. Marsh
- Cărți electroniceThe Earth as Modified by Human ActionGeorge P. Marsh