* http://web.archive.org/web/20090812141445/http://www.wargaming.info/ww2/ustest3.htm* "British Anti-tank Artillery 1939-45".
* http://web.archive.org/web/20090812141445/http://www.wargaming.info/ww2/ustest3.htm* "British Anti-tank Artillery 1939-45".