%0 Journal Article %J Journal of Paleontology %D 2007 %T Early Orthoceratoid Cephalopods from the Argentine Precordillera (Lower--Middle Ordovician) %A Kroeger, B. %A Beresi, M.S. %A E. Landing %K paleontology %B Journal of Paleontology %V 81 %P 1266-1283 %G eng %U http://dx.doi.org/10.1666/06-013.1