Verbatim text: Cook, C. D. K. and R. Lüönd. 1982b. A revision of the genus Hydrilla (Hydrocharitaceae). Aquatic Bot. 13: 485--504.
Author: Cook, C.D.K., L&uuml, R., ouml, nd
Year: 1982b
Title: A revision of the genus Hydrilla (Hydrocharitaceae)
Journal: Aquatic Bot
Volume: 13
Pages: 485–504