Praga E-211
neznámý (unknown)
Magazine Letectví, Vol. 23. (1947), No. 6 (September), title-page, <a rel="nofollow" class="external free" href="https://kramerius.army.cz/search/i.jsp?pid=uuid:63678d54-9ec4-11e9-a5c1-005056b73ae5">https://kramerius.army.cz/search/i.jsp?pid=uuid:63678d54-9ec4-11e9-a5c1-005056b73ae5</a>