Verbatim text: Haynes, R. R. 1979. Revision of North and Central American Najas (Najadaceae). Sida 8: 34--56.
Author: Haynes, R.R.
Year: 1979
Title: Revision of North and Central American Najas (Najadaceae)
Journal: Sida
Volume: 8
Pages: 34–56