Verbatim text: Beal, E. O. 1956. Taxonomic revision of the genus Nuphar Sm. of North America and Europe. J. Elisha Mitchell Sci. Soc. 72: 317-346.
Author: Beal, E.O.
Year: 1956
Title: Taxonomic revision of the genus Nuphar Sm. of North America and Europe
Journal: J. Elisha Mitchell Sci. Soc
Volume: 72
Pages: 317–346