The Birds USA magazine has some good resources in it as well like a list of avian vets, bird clubs and last year's had an A to Z list of bird diseases and symptoms so I will be holding onto that.
It also will have articles on different species, cages, food, poop and all kinds of things bird owners should know. It is definitely worth buying one every few years at least. Last years had some more updated information compared to the ones I bought more than 10 years ago.