Koll, Hilary. Using math to design a roller coaster / by Hilary Koll, Steve Mills, and Korey T. Kiepert. - North American ed. - Milwaukee, Wis. : Gareth Stevens Pub., 2007. - 32 p. : col. ill. ; 27 cm. - Mathworks! . ISBN: 0836867661 (lib. bdg.) 0836867734 (softcover) 9780836867664 (lib. bdg.) 9780836867732 (softcover) LCCN: 2006040565 Subjects--Topical Terms: Mathematics--Problems, exercises, etc.--Juvenile literature.Roller coasters--Design and construction--Juvenile literature. LC Class. No.: QA43 / .K624 2007 Dewey Class. No.: 510.76 / Kol