Pennings, H. W. J. (2006). Crab carapaces preserved in nautiloid shells from the Upper Paleocene of Huesca (Pyrenees, Spain). Universidad Nacional Autónoma de México.
Chicago Style (17th ed.) CitationPennings, Henri W. J. Crab Carapaces Preserved in Nautiloid Shells from the Upper Paleocene of Huesca (Pyrenees, Spain). Universidad Nacional Autónoma de México, 2006.
MLA (9th ed.) CitationPennings, Henri W. J. Crab Carapaces Preserved in Nautiloid Shells from the Upper Paleocene of Huesca (Pyrenees, Spain). Universidad Nacional Autónoma de México, 2006.
Warning: These citations may not always be 100% accurate.