@inbook {5399, title = {Erster Klasse des Cladus Plathelminthes: Turbellaria.}, booktitle = {Handbuch der Zoologie.}, volume = {2}, year = {1933}, month = {1933}, pages = {54 - 320}, keywords = {Hofstenia atroviridis, Hofstenia viridis}, author = {Bresslau,E}, editor = {Kukenthal,W and Krumbach,T} }