"UFO: An Appraisal of the Problem" written by the UFO Subcommittee of the American Institute of Aeronautics and Astronautics, Astronautics and Aeronautics Magazine, November, 1970, pp. 49-51. The UFO subcommittee found no "basis for his (Condon's) prediction that nothing of scientific value will come of further studies." The subcommittee pointed out that "it is difficult to ignore the small residue of well-documented but unexplainable cases which form the hard core of the UFO controversy" and that, furthermore, "a phenomenon with such a high ratio of unexplained cases (about 30%) should arouse sufficient scientific curiosity to continue its study."