<i>AEG Nitralampe</i>, poster draft by Valentin Zietara, Munich.
This draft by Valentin Zietara got a fourth prize at the AEG Nitralampen-Plakatwettbewerb of 1916.
<bdi><a href="https://www.wikidata.org/wiki/Q1386931" class="extiw" title="d:Q1386931"><span title="Polish painter (1883-1935)">Valentin Zietara</span></a>
</bdi>
<i>Das Plakat. Zeitschrift des Vereins der Plakatfreunde e.V.</i>, vol. 7, July 1916, appendix plates (not paginated).