Contributions to the botany of the Yukon Territory
Howe, Marshall A. (Marshall Avery), 1867-1936; Williams, R. S. (Robert Statham), 1859-1945; Underwood, Lucien Marcus, 1853-1907; Britton, Nathaniel Lord, 1859-1934; Rydberg, Per Axel, 1860-1931