I managed to finagle a complete full-color scan of an original copy of Eugen Sanger’s 1944 report, Uber einen Raketenantrieb fur Fernbomber (A Rocket Drive for Long Range Bombers). A “meh” quality B&W PDF of an English-language translation of the report has been available online for a while, but it seems to me that the world needs a proper high-rez version of the original, in color where appropriate.
One of the pages I’ve cleaned up from the new scan shows the statistical damage potential if New York City was regularly targeted by a very large number of bombs. This image, at least a black-and-white English-translated version, several generations removed from the original, is reasonably well-known and commonly reproduced… and as described a few years back, is generally described wrong.