@book{bhlitem44605, title = {Die Kalkschwa¨mme. Eine Monographie }, volume = {Bd.1}, copyright = {NOT_IN_COPYRIGHT}, url = {https://www.biodiversitylibrary.org/item/44605}, note = {https://www.biodiversitylibrary.org/bibliography/11919}, publisher = {Berlin, G. Reimer, 1872}, author = {Haeckel, Ernst,}, year = {1872}, pages = {504}, keywords = {59.34,6|Sponges|}, }