I have several CFLs, from the 2nd edition on, looking at the old data can be interesting and some frequencies are still in use by the same users, 30+ years later. But keep in mind that because of the nature of these signals the frequencies/users had often changed before you got the printed book into your hands, and since the books could run for years per edition the data was often very old. Don't get me wrong, it was a great resource, pretty much the best that could be found at the time, but there were some limitations. Today, with the web, there are more up-to-date sources to be found.
There is not one all-complete source of data for these kinds of signals. Most often your best bet is to look at several resources and use a bit of common since to filter the data.
In my opinion one of the best single resources for this kind of information is the NSA bot in the #wunclub IRC chat room. It has years of reported data, most of it with dates of submission so that you can decide if it is recent enough to apply to what you might be hearing. But the data is only as good as the people contributing. If no one contributes the data goes stale, if someone puts in bad data then it can mislead others later.
T!
