Heinkel airplane H.D. 39 for carrying newspapers
1926-08-01
Miscellaneous
No indication
English
Engineering Index Backfile | 1929
The high-speed Heinkel He 70 mail airplane
TIBKAT | 1934
|The High-speed Heinkel He 70 Mail Airplane
NTRS | 1934
|The Heinkel commercial airplane, H.D. 40
NTRS | 1927
Heinkel. Heinkel plane is exhibited in Paris
Engineering Index Backfile | 1928