Once I found a site on the web containing some classic, original material from around the WW II. One of the topics covered was submarine hunting. But I cannot find that again now ...
So the question is: Where can I find original documents, especially applied ones, from that period? Preferably web sites, but failing that, other options are good. Also of interest are references to particularly illuminating documents from that period. I found the paper British Operational Research in World War II by Joseph F. McCloskey, Operations Research, Vol. 35, No. 3 (May - Jun., 1987), pp. 453-470 (on JSTOR.)