English: 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.
Date
circa 1911
date QS:P,+1911-00-00T00:00:00Z/9,P1480,Q5727902
Source
Broschuere der Luftfahrzeug-GmbH(Parseval),aus dem Nachlass von Theodor Kiefer,Chefingenieur bei Parseval
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English: Parseval PL4 at Fischamend in Austria.jpg
{{Information |Description=Parseval-Luftschiff PL IV |Source=Broschuere der Luftfahrzeug-GmbH(Parseval),aus dem Nachlass von Theodor Kiefer,Chefingenieur bei Parseval |Date=ca. 1911 |Author=anonymous |Permission=anonymous, published more than 90 years ago