Focke-Wulf Fw 56, skica
neznámý (unknown)
1935-07-15
Letectví, Vol. 15. (1935), No. 7 (July), p. 258 - <a rel="nofollow" class="external free" href="https://kramerius.army.cz/search/i.jsp?pid=uuid:762f5940-5efa-11e9-8f08-005056b73ae5">https://kramerius.army.cz/search/i.jsp?pid=uuid:762f5940-5efa-11e9-8f08-005056b73ae5</a>