Ownbey, Gerald B.2015-02-182015-02-181969Ownbey, G. B. (1969). Annotated checklist of the seed plants, ferns and fern allies (division tracheophyta) for Clearwater County and Itasca State Park, Minnesota. University of Minnesota, Dept. of Botany.https://hdl.handle.net/11299/169916enReport