Heinkel H.E. 50 commercial seaplane : winner of the 1926 German Seaplane Contest at Warnemunde
1927-04-01
Miscellaneous
No indication
English
The 1926 German seaplane contest
NTRS | 1928
|The german seaplane competition
Engineering Index Backfile | 1926
Richard-Penhoet commercial seaplane
NTRS | 1927