Map of the Battle of Aspern-Essling ((21–22 May 1809)
Wiktor Kazimierz Grzegorz Kozłowski (1791–1858)
Biblioteka Narodowa (National Library of Poland) / Polona: <a rel="nofollow" class="external free" href="https://polona.pl/item/50374377/0/">https://polona.pl/item/50374377/0/</a>