@book{bhlitem16142, title = {Zeit- und Streitfragen der Biologie }, volume = {Heft 2 (1897)}, copyright = {Public domain. The BHL considers that this work is no longer under copyright protection.}, url = {https://www.biodiversitylibrary.org/item/16142}, note = {https://www.biodiversitylibrary.org/bibliography/1296}, publisher = {Jena, G. Fischer, 1894-97}, author = {Hertwig, Oscar,}, year = {1897}, pages = {227}, keywords = {Cells|Cytology}, }