By Richard Beadle (University of Cambridge)
By Robert Smallwood
By Matthew C. Roudane (Georgia State University)
By Richard Brown, Judith O'Neill
By Patricia M. Schwarz, John H. Schwarz (California Institute of Technology)
By Peter Szekeres (University of Adelaide)
By Malcolm S. Longair (University of Cambridge)
By James J. Tattersall (Providence College, Rhode Island)
By Daniel F. Styer (Oberlin College, Ohio)
By Miles Reid (University of Warwick), Balazs Szendroi (Universiteit Utrecht, The Netherlands)
By Peter J. Eccles (University of Manchester)
By R. P. Burn (University of Exeter)
By Daniel Fleisch (Wittenberg University, Ohio)
By David Davies
By Sue Pemberton
By A. David Moody
By Susan J. Wolfson (Princeton University, New Jersey)
By Efrain Kristal (University of California, Los Angeles)
By Albert Gelpi
By Dennis Danielson (University of British Columbia, Vancouver)
By K. F. Riley (University of Cambridge), M. P. Hobson (University of Cambridge), S. J. Bence
By Elisa New (University of Pennsylvania)
By David Morley, Philip Neilsen (Queensland University of Technology)
By David Crystal
By North American Cambridge Classics Project
By Geoffrey Howson, Christine Keitel, Jeremy Kilpatrick
By W. G. Rees
By School Mathematics Project
By David A. Brannan (The Open University, Milton Keynes), Matthew F. Esplen (The Open University, Jeremy J. Gray (The Open University
By Bryan Gilliam (Duke University, North Carolina)