Encyclopedias of military aircraft are useful...
On the contrary, encyclopedias of military aircraft are rarely as accurate as Wikipedia. In fact, many of them are about as accurate as the history channel (actually, maybe that's why the history channel is so inaccurate)
Wikipedia is generally a pretty good source, especially on big issues-- where there's a lot of people editing, arguing about every little detail. There's literally thousands of rabid fact potatos on wikipedia that will debate every semantic.
