@ARTICLE{Kennedy_W.J._A_2016,
 author={Kennedy, W.J.},
 volume={vol. 66},
 number={No 4},
 journal={Acta Geologica Polonica},
 howpublished={online},
 year={2016},
 publisher={Komitet Nauk Geologicznych PAN},
 publisher={Wydział Geologii UW},
 title={A survey of the Cretaceous ammonite Placenticeras Meek, 1876, in the United States Western Interior, with notes on the earliest species from Texas},
 URL={http://journals.pan.pl/Content/107404/PDF/249.pdf},
 doi={10.1515/agp-2016-0031},
}