Griffiths, Andy. What bumosaur is that? by Andy Griffiths, Terry Denton. - London: Macmillian, 2007. - 84 p.: col. ill., 23 cm. 3-6. English. ISBN: 9780230700758 Subjects--Topical Terms: Buttocks.Dinosaurs.Practical jokes. Index Terms--Genre/Form: Wit and humor, Juvenile. Dewey Class. No.: F GRI/O