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