this edition written and researched by Karla Zimmerman and eight others. this edition written and researched by Korina Miller and seven others. this edition written and researched by Karla Zimmerman, Catherine Le Nevez. this edition written and researched by Anthony Ham and eight others. this edition written and researched by Neil Wilson and seven others. this edition written and researched by Neil wilson and nine others. this edition written and researched by Nicola Williams and three others. this edition written and researched by Emilie Filou and three others. this edition written and researched by Iain Stewart and three others. this edition written and researched by China Williams and six others