The genus Euphrasia in North America
Fernald, Merritt Lyndon, 1873-1950 Wiegand, K. M. (Karl McKay), 1873-1942
Article
1915
Contributions from the Gray Herbarium of Harvard University
Issue: 44
181--201
Harvard University Botany Libraries
English
[Cambridge, Mass.] Harvard University -1984]
DOI: https://doi.org/10.5962/p.335982 Wikidata: https://www.wikidata.org/entity/Q94388336