The helioplane (the Hackenberger invention) : now under construction.

Bibliographic Details
Corporate Author:	Helioplane Company of America
Other Authors:	Davis, Abner
Format:	Book
Language:	English
Published:	Fort Worth, Tex. : Helioplane Company of America, [1929]
Subjects:	Helio aircraft > History. Short take-off and landing aircraft > History. Hackenberger, August L.

Cushing: Ragan Military (Does not check out)