2 ms·
The DC-4 was also introduced in the 1930s: http://en.wikipedia.org/wiki/Douglas_DC-4 http://en.wikipedia.org/wiki/Douglas_DC-4
by Maktab 16y ago
The DC-4 was also introduced in the 1930s: http://en.wikipedia.org/wiki/Douglas_DC-4 http://en.wikipedia.org/wiki/Douglas_DC-4