@tubetime What is the source of this picture? Fig.174 and in English instead of German.
@artelse a report from Operation Backfire. see https://library.si.edu/digital-library/book/reportonoperati2grea
@tubetime Thanks, and beautiful illustrations.
@artelse a report from Operation Backfire. see https://library.si.edu/digital-library/book/reportonoperati2grea