Wirtschaftliche probleme des deutschen luftverkehrs ...
Publisher: [Kellinghusen, H.J.J. Hay]
Published: 1930
Place of publication: Hamburg
Language: ger
Number of pages: 87
Subjects: Aeronautics, Commercial -- Germany.
Notes: "Literaturnachweis": p. iv-vi.
Inaug.-diss.--Hamburg.
Lebenslauf.