"Dryas integrifolia Vahl. in bloom.", Stefansson Collection of Arctic Photographs - Photographic Prints, 1913, Digital by Dartmouth Library, n2t.net/ark:/83024/d4kk94h68.
Citation (Chicago Format)
Dryas integrifolia Vahl. in bloom, 1913. Digital by Dartmouth Library. https://n2t.net/ark:/83024/d4kk94h68.