@article{ken_1980.1767, title = {Collignoniceratid ammonites from the mid-Turonian of England and northern France}, author = {Kennedy, William James and Wright, C. Willy and Hancock, Jake }, year = {1980}, journal = {Palaeontology (Palaeontological Association) London}, volume = {23}, number = {3}, pages = {557–603}, url = {https://www.kreidefossilien.de/1801}, keywords = {kennedy,wright,hancock,ammoniten,bila hora} }