Unfortunately, many of the magazines have ceased production over the years. Some were made of questionable reasons (like most of Ed Lang's publications) but there have been some very good magazines. I am trying to finish my colection of N (Nude and Natural / Clothes with the Sun) series put out by the Naturist Society in America. It is one of the best resource for American Naturism, in the opinion. For earlier history, Sunshine and Health / The Nudist is one of the better resources, and earliest. Australian Sun and Health was along the same lines as Sunshine and Health, but from an Australian angle. The Ed Lamb's Elysium magazine could be almost borderline softcover porn, from what I have seen.
I am sorry to seen Australian Sun and Health close, only so many places for good news and articles left.