List of references by intial letter. Not all the references are complete or correct. If you have more or better information, please let me know.

Ingles, J. M. and Sawyer, F. C. ; 1979; A catalogue of the Richard Owen collection of Palaeontological and Zoological drawings in the British Museum (Natural History); Buletin of the British Museum of Natural History (Historical Service); Vol.6:5: pp.109-197:
Irby, Grace V. ; 1995; Marine reptiles from the Upper Cretaceous Mancos Shale, Black Mesa, Northeastern Arizona; Proceedings of Southwest Paleontological Society and Mesa Southwest Museum, Mesa, Arizona; III: pp.75-80:
Irwin, Kelly and Schumacher, Bruce A. ; 2003; An additional record of a polycotylid plesiosaur from the upper Campanian of North America; Journal of Vertebrate Paleontology; 23:3, Suppl.: pp.65:
Iturralde-Vinent, Manuel and Norell, Mark ; 1996a; Synopsis of the Late Jurassic Marine Reptiles from Cuba; American Museum Novitates; No. 3164: pp.7 pages:
Iturralde-Vinent, Manuel and Norell, Mark ; 1996b; Cuban Jurassic Reptiles: A poorly known fauna in the western prolongation of the TethysDinofest International Symposium, programs and abstracts; pp.64: