- Livre électroniqueThe Earth as Modified by Human ActionGeorge P. Marsh
- Livre électroniqueThe Whelps of the WolfGeorge P. Marsh
- Livre électroniqueMan and Nature; Or, Physical Geography as Modified by Human ActionGeorge P. Marsh
- Livre électroniqueMan and Nature; Or, Physical Geography as Modified by Human ActionGeorge P. Marsh
- Livre électroniqueMan and NatureGeorge P. Marsh
- Livre électroniqueThe Earth as Modified by Human ActionGeorge P. Marsh