Helicopters: A First Look
(Reklamlänk)
Helicopters are small and have blades instead of wings. Their size can make them very useful for all sorts of jobs. Full-color photographs and leveled text show readers all the things that helicopters can do.
(Reklamlänk)
Helicopters are small and have blades instead of wings. Their size can make them very useful for all sorts of jobs. Full-color photographs and leveled text show readers all the things that helicopters can do.
