"JUVENILE NONFICTION / Technology / Aeronautics, Astronautics & Space Science" . . "Aerodynamics, Supersonic." . . "ABDO Digital (Firm)" . . . . . "Discusses defining moments in American history."@en . "Juvenile works" . . . . . . "Downloadable ABDO ebooks"@en . "Breaking the Sound Barrier eBook"@en . "Electronic books" . "Electronic books"@en . . "Breaking the sound barrier" . "Breaking the sound barrier"@en . . "Traces the development of supersonic aerodynamics and the breaking of the sound barrier." . . . . . . "JUVENILE NONFICTION / Transportation / Aviation" . .