A reference to 355 dinosaurs from the Triassic, Jurassic & Cretaceous periods, including more than 900 illustrations, maps, timelines & photographs. It features such key groups as: sauropods, theropods, ornithopods, ankylosaurs, stegosaurs, carnosaurs, polacanthids, diplodocids, iguanodonts, boneheads, & many more.