Zooplankton and Micronekton of the North Sea 2.0: The hydroid species of Obelia (Coelenterata, Hydrozoa, Campanulariidae), with notes on the medusa stage. Bulletin of the British Museum (Natural History) (Zoology Series) 28: 249-293.

Literature

Authors(s)	Cornelius, P.F.S.
Year	1975a
Title	The hydroid species of Obelia (Coelenterata, Hydrozoa, Campanulariidae), with notes on the medusa stage. Bulletin of the British Museum (Natural History) (Zoology Series) 28: 249-293.