Incredible covers (but, sadly only the covers), during an odd run, while the 30th Century teen heroes deal with the mystery of Reflecto, and the return of Superboy.
Legion of Super-Heroes #277 and #278 (July and August, 1981)
Legion of Super-Heroes #279 and #280 (September and October, 1981)
Legion of Super-Heroes #281 (November, 1981)
George did a special file in a Best of DC digest (more on this sometime in the future), the Legion was well represented in the Crisis On Infinite Earths, and finally getting close to a Legion book with the mini-series, Final Crisis: Legion Of 3 Worlds.