1. Geographical division and distribution of Rodentia (gnawing animals) / Geographical division and distribution of Ruminantia (ruminating animals) Princeton University Public content 1848. Johnston, Alexander Keith, 1804-1871. 2 world maps, one showing distribution of rodents, the other showing distribution of ruminants; relief shown by hachures. At head of title: Zoologi... Edinburgh ; London : William Blackwood & Sons, [1848].