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Journal kept by David Douglas during his travels in North America 1823-1827together 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 1834Bookحسب Douglas, David, 1799-1834
منشور في 1914 -
حسب Fermi, Rachel
منشور في 1995 -
حسب Larrison, Earl J. (Earl Junior), 1919-1987
منشور في 1976 -
حسب Waters, Aaron C. (Aaron Clement), 1905-1991
منشور في 1967 -
حسب Smith, Alexander H. (Alexander Hanchett), 1904-1986
منشور في 1975 -
حسب Patty, Ernest N. (Ernest Newton), 1894-1976
منشور في 1921 -
حسب Steward, Albert Newton, 1897-
منشور في 1960 -
حسب Sherzer, W. H. (William Hittell), 1860-1932
منشور في 1907