Beneš-Mráz Be-150 Beta-Junior s motorem Walter Junior 4 (1937)
neznámý (unknown)
1937-06-15
Letectví, Vol. 17. (1937), No. 5-6 (May-June), p. 246, <a rel="nofollow" class="external free" href="https://kramerius.army.cz/search/i.jsp?pid=uuid:cf2a02c0-5f06-11e9-afe3-005056b73ae5">https://kramerius.army.cz/search/i.jsp?pid=uuid:cf2a02c0-5f06-11e9-afe3-005056b73ae5</a>