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References
- ↑ Beatriz Aguirre-Urreta and Peter F. Rawson (2012). "Lower Cretaceous ammonites from the Neuquén Basin, Argentina: A new heteromorph fauna from the uppermost Agrio Formation". Cretaceous Research. 35: 208–216. Bibcode:2012CrRes..35..208A. doi:10.1016/j.cretres.2012.01.001. hdl: 11336/68453 .