@book{bhlitem43989, title = {Die Kalkschwämme. Eine Monographie ... }, volume = {Bd.1 (1872)}, copyright = {NOT_IN_COPYRIGHT}, url = {https://www.biodiversitylibrary.org/item/43989}, note = {https://www.biodiversitylibrary.org/bibliography/11323}, publisher = {Berlin, G. Reimer, 1872}, author = {Haeckel, Ernst,}, year = {1872}, pages = {512}, keywords = {Sponges|}, }