this edition written and researched by Anthony Ham [and 12 others]. this edition written and researched by Anthony Ham [and nine others] this edition written and researched by Anthony Ham [and nine others this edition written and researched by Steve Fallon [and others]. this edition written and researched by Tom Masters [and others]. this edition written and researched by Oliver Berry [and 4 others] this edition written and researched by Tom Masters [and others] this edition written and researched by Amy C. Balfour [and six others]. this edition written and researched by Mary Fitzpatrick [and 4 others]. this edition written and researched by Oliver Berry [and 4 others