Note: Tenn accepted a tenured position in the mid-1960's and wrote little fiction afterwards. Note that Philip J. Klass (1919 - 2005), editor of ''Aviation Week'' and prominent anti-UFOlogist, was a different person. Donald H. Tuck was partially responsible for the confusion: he attributed Philip J. Klass's UFO's - Identified (published as by Philip Klass in 1968) to Tenn in the first volume of his The Encyclopedia of Fantasy and Science Fiction (1968).