Verbatim text: Catling, P. M. and W. G. Dore. 1982. Status and identification of Hydrocharis morsus-ranae and Limnobium spongia (Hydrocharitaceae) in northeastern North America. Rhodora 84: 523--545.
Author: Catling, P.M., Dore, W.G.
Year: 1982
Title: Status and identification of Hydrocharis morsus-ranae and Limnobium spongia (Hydrocharitaceae) in northeastern North America
Journal: Rhodora
Volume: 84
Pages: 523–545