Official website William Tenn at the Internet Speculative Fiction Database William Tenn at the Encyclopedia of Science Fiction, 3rd edition (draft) Bibliography Works by Philip Klass at Project Gutenberg Works by or about William Tenn and Philip Klass at Internet Archive Works by Philip Klass at LibriVox (public domain audiobooks) "More Than a Touch of Klass" by Laurie Mann UPI (January 2, 1977).