@article{log_1899.785, title = {Contributions to the paleontology of the upper cretaceous series}, author = {Logan, William Newton and Ferrington, Oliver Cummings }, year = {1899}, journal = {Field Columbian Museum – Geological Series (Field Museum) Chicago}, volume = {36}, pages = {207–216}, url = {https://doi.org/10.5962/bhl.title.3298}, doi = {10.5962/bhl.title.3298} }