Andrej Tupolev (Letectví, November 1937)
Letectví (neznámý, unknown)
1937-11-15
Letectví, Vol. XVII. (1937), No. 11 (November), p. 518, <a rel="nofollow" class="external free" href="https://kramerius.army.cz/search/i.jsp?pid=uuid:2682133e-5f03-11e9-be69-005056b73ae5">https://kramerius.army.cz/search/i.jsp?pid=uuid:2682133e-5f03-11e9-be69-005056b73ae5</a>