Hydrozoa source details
Sawyer, R.T. (1986). Leech biology and behaviour. Vol. II. Feeding biology, ecology, and systematics. Clarendon Press. 375 p.
66836
Sawyer, R.T.
1986
Leech biology and behaviour. Vol. II. Feeding biology, ecology, and systematics
Clarendon Press. 375 p.
Publication
Kristian Fauchald's Polychaeta DB
German Egel for Hirudinea