The source is indicated as "Hamburg City Library". I find this less than satisfactory. I presume the source is a book or some kind of document. /B****n (留言) 10:06, 8 September 2017 (UTC)[回覆]
.png&action=edit§ion=1){kind=link}
.png#c-B****n-2017-09-08T10:06:00.000Z-Source?){kind=link}
.png&oldid=258009566){kind=link}