@article{ERMS:SourceID:81884, author = {Claus, C.}, journal = {N.G. Elwert'sche Verlagsbuchhandlung, Marburg}, note = {"Principles of zoology, for scientific use" Record for Volume 1 only.
BHL DOI for both volumes = http://dx.doi.org/10.5962/bhl.title.1113
Cnidaria = p.222-294.
Annelida = p.455-505}, title = {Grundzüge der Zoologie, zum wissenschaftlichen gebrauche [fourth edition]}, url = {http://biodiversitylibrary.org/page/913950}, year = {1880} }