Goodman, Susan E., 1952- Choppers / by Susan E. Goodman ; photographs taken and selected by Michael J. Doolittle. - 1st ed. - New York : Random House, c2004. - 47 p. : ill. ; 23 cm. - Step into reading. Step 4 . - Step into reading. Step 4 book. . ISBN: 0375825177 (trade) 0375925171 (lib. bdg.) LCCN: 2003026838 Subjects--Topical Terms: Helicopters--Juvenile literature.Helicopters. LC Class. No.: TL716.2 / .G66 2004 Dewey Class. No.: