Drawing of Air-Raid Damaged Site of <a href="https://en.wikipedia.org/wiki/Nagaoka,_Niigata" class="extiw" title="en:Nagaoka, Niigata">Nagaoka</a>
<a href="https://ja.wikipedia.org/wiki/%E7%AC%AC%E4%B8%80%E5%BE%A9%E5%93%A1%E7%9C%81" class="extiw" title="ja:第一復員省">第一復員省</a>
National Archives of Japan Digital Archive