Text ( visual ) : unmediated The pathfinders / by David Nevin and the editors of Time-Life Books. -- lib. bdg.. -- Alexandria, Va. : Time-Life Books , c1980. -- 176 p. : ill. ; 29 cm. -- (The epic of flight ; v. 2). -- Bibliography: p. 172-173 ; Includes index. -- ISBN 0809432560 ; 0809432552 ; (BA78219382) ; https://ci.nii.ac.jp/ncid/BA78219382 Author Heading(s): Nevin, David ; Time-Life Books. -- Classification(s): LCC : TL521 ; DC : 629.13/092/4 ; DC : B. -- Subject Heading(s): LCSH : Aeronautics -- United States -- History ; LCSH : Aeronautics -- Flights