Journal kept by David Douglas during his travels in North America 1823-1827 : together with a particular description of thirty-three species of American oaks and eighteen species of Pinus, with appendices containing a list of the plants introduced by Douglas and an account of his death in 1834 (es)
Journal kept by David Douglas during his travels in North America 1823-1827 : together with a particular description of thirty-three species of American oaks and eighteen species of Pinus, with appendices containing a list of the plants introduced by Douglas and an account of his death in 1834 (es)
