http://www.muzeum.gliwice.pl/en/radiostacja/
museum in gliwice
http://www.time.com/time/magazine/article/0,9171,958453-1,00.html
Blitzkrieg September 1, 1939: a new kind of warfare engulfs Poland
Polish Radio Broadcast
http://www.history.com/video.do?name=militaryhistory&bcpid=1681694250&bclid=1699210677&bctid=1606750320
http://news.bbc.co.uk/hi/english/static/special_report/1999/08/99/world_war_11/default.stm
The day the war began