librokovrilo de "Dua Bulteno, Universala Kongreso de Esperanto, Varsovio, 1959
<span lang="en">Anonymous</span><span style="display:none">Unknown author</span> <a class="external free" href="https://commons.wikimedia.org/w/index.php?title=File:1959_Dua_Bulteno.jpeg&amp;action=edit">https://commons.wikimedia.org/w/index.php?title=File:1959_Dua_Bulteno.jpeg&amp;action=edit</a>
Scan from the original work