@book{bhlitem17974, title = {Proceedings of the Academy of Natural Sciences of Philadelphia }, volume = {v.61 (1909)}, copyright = {Public domain. The BHL considers that this work is no longer under copyright protection.}, url = {https://www.biodiversitylibrary.org/item/17974}, note = {https://www.biodiversitylibrary.org/bibliography/6885}, publisher = {Philadelphia, Academy of Natural Sciences of Philadelphia, }, author = {Academy of Natural Sciences of Philadelphia.}, year = {1909}, pages = {678}, keywords = {Natural history|Natuurwetenschappen|Periodicals|Science}, }