Counter-propeller
Le contro-eliche <engl.>
1930
11, [4] Bl
Ill., graph. Darst
Buch
Englisch
| NTRS | 1931
| Engineering Index Backfile | 1930
Experiments with counter-propeller
| Engineering Index Backfile | 1933
Experiments with a Counter-propeller
| NTRS | 1933