@book{bhlitem53401, title = {Malakozoologische Blätter }, volume = {Bd.19-20 (1872-1873)}, copyright = {Public domain. The BHL considers that this work is no longer under copyright protection.}, url = {https://www.biodiversitylibrary.org/item/53401}, note = {https://www.biodiversitylibrary.org/bibliography/15800}, publisher = {Cassel, T. Fischer, 1854-1891}, author = {Clessin, Stephan, and Menke, Karl Theodor, and Pfeiffer, Louis (Ludwig Georg Karl),}, year = {1872}, pages = {450}, keywords = {Mollusks|Periodicals|}, }