@article{Turbellarians:SourceID:236061, author = {Schmidt, O.}, journal = {Friedrich Mauke, Jena}, title = {Die rhabdocoelen Strudelwürmer (Turbellaria Rhabdocoela) des süssen Wassers.}, url = {https://www.biodiversitylibrary.org/page/34995539}, year = {1848} }