At the risk of going further off topic.
Alternately one could find documents on the internet that not only refuted but make the source of the claim fairly clear i.e.Sid Guttridge wrote:... To take one minor example, on this site it was claimed by one poster that it was a US-crewed Catalina that spotted the Bismarck. It wasn't, but only by going to the national archives could one find definitive documentary evidence. A casual, unsourced remark by an almost purely internet-based "expert" that took only seconds to put up here could only be countered by several hours research in the archives. Worse, the poster never withdrew the misleading claim and it still stands here. I can give other examples. ....
http://www.history.navy.mil/faqs/faq118-3.htm
or
http://www.history.navy.mil/faqs/faq118-1.htm
with only a few minutes worth of searching.