By Dr John Sugden
By Stephen Glover
By Edward Ashbee
By Duncan Watts
By Henryk Grossmann
By David Randall, Randall, David
By W H Brock, A.J. Meadows
By Grainge, Paul, Jancovich, Mark, Monteith, Sharon
By Richard van de Lagemaat
By James Wines
By Jeremy Tunstall
By John Mitchinson
By David Matless
By Anne Laurence
By Tony Pinkney
By Christina Hellmich
By Michael Diamond
By Joel Kovel
By Harriette Wilson
By Maggie Craig
By Apryl Williams
By Laura Robinson
By Brian Rowan
By Dani Gamerman, Hedibert F. Lopes
By Professor James Walvin
By Geneva Small Arms Survey, Adkins, Lesley
By Professor Peter B. R. Hazell