Page 10 of the Broschuere der Luftfahrzeug-GmbH showing PL4 landed at Vienna and flying over the city. Also shown are the hydrogen gas bottles needed to fill the 2000 cubic metre airship.
<span lang="en">Anonymous</span><span style="display:none">Unknown author</span>
circa 1911 <div style="display: none;">date QS:P,+1911-00-00T00:00:00Z/9,P1480,Q5727902</div>
Broschuere der Luftfahrzeug-GmbH(Parseval),aus dem Nachlass von Theodor Kiefer,Chefingenieur bei Parseval